Top 100+ Animal Kingdom - Biology Questions and Answers For NEET 2024 Exam Preparation

Q1. Cloaca is seen in case of

1. Reptiles
2. Amphibia
3. Aves
4. All of these

Answer: (d)

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Q2. Body bears eight external rows of ciliated comb plates present in phylum _____.

1. Porifera
2. Coelentrata
3. Ctenophora
4. Platyhelminthes

Answer: (c)

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Q3. Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of Phylum

1. Coelenterata
2. Mollusca
3. Protozoa
4. Porifera.

Answer: (d)

Phylum Porifera (the sponges) has cellular level of body organisation, with inner cellular layer consisting of highly specialised flagellated cells called choanocytes (or collar cells).

The development in this phylum is indirect as it includes a free swimming larva called amphiblastula or parenchyma for dispersal of the species.

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Q4. The following features belongs to which phylum?

1. Exclusively marine
2. Radial symmetry
3. Diploblastic
4. Tissue level organization

1. Porifera
2. Coelentrata
3. Ctenophora
4. Platyhelminthes

Answer: (c)

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Q5. Identify the vertebrate group of animals characterised by crop and gizzard in its digestive system.

1. Aves
2. Amphibia
3. Reptilia
4. Osteichthyes

Answer: (a)

The alimentary canal of birds have additional chambers, the crop and gizzard. Crop stores and softens the food, however the gizzard helps in crushing and churning the food.

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Q6. Animals having cylindrical body having an organ system level of organization showing metamerism belongs to phylum

1. Mollusca
2. Arthropoda
3. Annelida
4. Platyhelminthes

Answer: (c)

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Q7. Which of the following is not correct matching of phylum and its three examples?

1. Mollusca : Teredo, Aplysia, Chaetopleura
2. Annelida : Aphrodite, Chaetopterus, Bonnelia
3. Aschelminthes : Ancylostoma, Enterobius, Tubifex
4. Arthropoda : Buthus, Lepisma, Leptocorisa

Answer: (c)

Tubifex is blood worm, it is an annelid.

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Q8. Which of the following are economically important insects?

1. Laccifer and Anopheles
2. Bombyx and Apis
3. Locusta and Limulus
4. All of these

Answer: (d)

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Q9. Feet of kingfisher are modified for

1. running
2. wading
3. perching
4. catching.

Answer: (b)

Hindlimbs are variously modified for various functions like perching, grasping etc. In the kingfisher they are modified for wading. The legs and toes are exceptionally long and slender and serve to walk over aquatic vegetation or marshes.

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Q10. Which of the following characteristics is correct for reptilia?

1. Freshwater animals with bony endoskeleton and air bladder regulate buoyancy.
2. Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears.
3. Body is covered with moist skin and is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca.
4. Marine animals with cartilaginous endoskeleton and body is covered with placoid scales.

Answer: (b)

In option (b) all the characteristics belong to class reptilia.

In options (a), (c) and (d) the characteristics belong to the classes amphibia, osteichthyes and chondrichthyes respectively.

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Q11. Organ Pipe Coral is

1. Helipora
2. Tubipora
3. Astraea
4. Fungia.

Answer: (b)

The common name of Tubipora is Organ Pipe Coral. It is a marine animal of the Class Anthozoa (Phylum Cnidaria).

It occurs on reefs in shallow waters of the Indian and Pacific oceans and is characterized by long, parallel upright polyps or stalks, supported by a skeleton of rigid tubes of calcium carbonate.

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Q12. Which one assists in locomotion?

1. Pedicellariae of starfish
2. Trichocysts in Paramecium
3. Clitellum in Pheretima
4. Posterior sucker in Hirudinaria

Answer: (d)

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Q13. Reptilia means

1. Swim mode of locomotion
2. Flying mode of locomotion
3. Saltation mode of locomotion
4. Creeping or crawling mode of locomotion

Answer: (d)

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Q14. Eye of the molluscan group that resembles vertebrate eye is

1. pelecypoda
2. bivalvia
3. gastropoda
4. cephalopoda.

Answer: (d)

In cephalopoda paired eyes are large, efficient and bulge from the dorsolateral sides of the head.

They bear striking resemblance to those of a vertebrate in that a cornea, iris, lens and retina are present. Lens projects an inverted image on the retina, as in the vertebrate eye. External muscle attachments enable limited movements of the eye.

But the embryological development of the cephalopod eye is entirely different from that of the vertebrate eye, so that homologically they are different, for the vertebrate eye is formed as an outgrowth of the brain, while the cephalopod eye is formed by an ectodermal invagination.

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Q15. Notochord is extended from head to tail region and is persistent throughout their life in

1. Urochordata
2. Hemichordata
3. Cephalochordata
4. All of these

Answer: (c)

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Q16. Mark the correct match of the animal and its common name

1. Ascidia – lancelet
2. Trygon – dog fish
3. Pterophyllum – flying fish
4. Myxine – hagfish

Answer: (d)

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Q17. Annual migration does not occur in the case of

1. siberian crane
2. arctic tern
3. salmon
4. salamander.

Answer: (d)

Migration is the seasonal movement of complete populations of animals to a more favourable environment. It is common in mammals (e.g. porpoises), fish (e.g. eels and salmon) and some insects but is most marked in birds.

The arctic tern, for example, migrates annually from its breeding ground in the Arctic circle to the Antarctic. Salmon usually migrate from marine to fresh water to spawn. The siberian crane, breeds in arctic Russia in Ykutia and western Siberia.

It is a long distant migrant. Salamander is an amphibian with slender body, short legs and long tail. Outside the breeding season they are seldom seen as they spend most of their time underground.

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Q18. Planaria, Liver fluke and Taenia solium Are

1. All found in the gut
2. All segmented
3. All have coelom
4. All are flatworms

Answer: (d)

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Q19. Which of the following is an example of platyhelminthes?

1. Trypanosoma
2. Plasmodium
3. Schistosoma
4. Wuchereria

Answer: (c)

Platyhelminthes have soft and dorsoventrally flattened body with bilateral symmetry. Plasmodium and Trypanosoma belong to Phylum Protozoa while Wuchereria belongs to Phylum Aschelminthes.

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Q20. Kidney of adult rabbit is

1. mesonephros
2. pronephros
3. metanephros
4. opisthonephros.

Answer: (c)

Kidney of adult rabbit is metanephros. It is formed from the posterior end of the nephrogenic mesoderm which is displaced somewhat anteriorly and laterally.

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Q21. Select the total number of organism from the following which contains well-developed muscular pharynx with complete alimentary canal.

Taenia, Fasciola, Planaria, Ascaris, Filarial worm, Hookworm

1. 3
2. 1
3. 4
4. 2

Answer: (a)

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Q22. In which one of the following the genus name, its two characters and its class/phylum are correctly matched?

1. (a)
2. (b)
3. (c)
4. (d)

Answer: (a)

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Q23. Which of the protozoan is considered as connecting link between plants and animals?

1. Paramoecium
2. Entamoeba
3. Euglena
4. Monocystis

Answer: (c)

Euglena is considered as the connecting link between plants and animals.

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Q24. Which of the following are pseudocoelomate?

1. Hookworm
2. Roundworm
3. Filarial worm
4. All of these

Answer: (d)

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Q25. Coelom derived from blastocoel is known as

1. schizocoelom
2. enterocoelom
3. pseudocoelom
4. haemocoelom

Answer: (c)

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Q26. Which one of the following groups of animals is correctly matched with its characteristic feature without any exception?

1. Chondrichthyes : possess cartilaginous endoskeleton
2. Reptilia : possess 3-chambered heart with an incompletely divided ventricle
3. Chordata : possess a mouth with an upper and a lower jaw
4. Mammalia : give birth to young ones

Answer: (a)

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Q27. The given figures A, B, C and D are the examples of first true land vertebrates. They are dominant in mesozoic era and belong to phylum ‘X’. Identify ‘X’ and the animals which have four chambered heart. A B C D

1. X – Amphibia, C
2. X – Reptile; B
3. X – Reptile; A
4. X – Pisces; D

Answer: (b)

The given figures (A, B, C and D) are respectively chameleons, crocodile, turtle and cobra. Reptiles are the first true land vertebrates and dominant in Mesozoic era. They are cold blooded vertebrates. Heart in reptiles are usually three chambered but four chambered in crocodiles.

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Q28. Ureters act as urinogenital ducts in

1. human males
2. frog’s males
3. human females
4. frog’s both males and females

Answer: (b)

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Q29. Bird vertebrae are

1. amphicoelous
2. acoelous
3. heterocoelous
4. procoelous.

Answer: (c)

Bird vertebrae are heterocoelous i.e., the centra of vertebrae have saddle-shaped ends. Acoelous refers to vertebrae that are flat on both ends (mammals).

Amphicoelous means both ends of the centrum are concave (fish). Procoelous means concave in front and convex in back (anurans and reptiles).

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Q30. Select the difference which is wrongly written:

1. (a)
2. (b)
3. (c)
4. (d)

Answer: (d)

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Q31. In which animal, dimorphic nucleus is found ?

1. Trypanosoma gambiense
2. Amoeba
3. Plasmodium vivax
4. Paramecium caudatum

Answer: (d)

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Q32. Assertion: Ascidia belong to sub - phylum urochordata.

Reason: Notochord is present in tail of larva stage.

1. If both the assertion and reason are true but the reason is not a correct explanation of the assertion .
2. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Answer: (b)

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Q33. Both male and female pigeons secrete milk through

1. crop
2. salivary glands
3. modified sweat glands
4. gizzard.

Answer: (a)

Pigeons are noted for their unique ability to produce "pigeon's milk", a soft, cheesy and nourishing secretion, especially during the breeding season. It is formed by the degeneration of the epithelial cells lining the crop.

It is regurgitated into the mouth of the young birds until they are old enough to manage a grain-diet like their parents. The pigeon's milk includes water, fat, protein (casein) and lactose. The milk is produced by both sexes and contains 35 per cent of fat.

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Q34. Bladderworm/cysticercus is the larval stage of

1. pinworm
2. tapeworm
3. roundworm
4. liver fluke.

Answer: (b)

Cysticercus is the larval stage of tapeworm which is characterised by a large vesicle and one scolex. Cysticercus develops in adult tapeworm only when ingested by the human host.

In pig's body it leads quite an inactive life and remains viable for several years, after which it dies and becomes calcified. Pork (pig's flesh) containing viable cysticerci is called measly pork for its spotted appearance.

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Q35. The chief advantage of encystment of an Amoeba is

1. the chance to get rid of accumulated waste products
2. protection from parasites and predators
3. the ability to survive during adverse physical conditions
4. the ability to live for some time without ingesting food

Answer: (c)

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Q36. Radial symmetry is usually associated with

1. lower grade of organisation
2. aquatic mode of life
3. creeping mode of locomotion
4. sedentary mode of life

Answer: (a)

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Q37. Assertion : Torison can be seen in ctendium.

Reason : Ctenidium acts as the respiratory organ.

1. If Assertion is true but Reason is false.
2. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
3. If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
4. If both Assertion and Reason are false.

Answer: (c)

Ctenidium is a gill situated on the right side of the branchial chamber. It helps in respiration by beating cilia. During development, ctenidium shifts from left side to right side which is called "torison". It is characteristic feature of gastropods.

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Q38. Skin is moist and a tympanum representing ear is found in

1. Frog
2. Hyla
3. Ichthyophis
4. All of these

Answer: (d)

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Q39. Aquatic reptiles are

1. ammonotelic
2. ureotelic
3. ureotelic in water
4. ureotelic over land.

Answer: (c)

The waste material of aquatic reptiles chiefly consists of urea, so they are ureotelic. Land forms are uricotelic i.e., their water material consists of uric acid.

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Q40. Cnidoblast is used for

1. Defense
2. Anchorage
3. Capture of prey
4. All of these

Answer: (d)

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Q41. Starfish belongs to

1. holothuroidea
2. asteriodea
3. ophiuroidea
4. crinoidea.

Answer: (b)

Starfishes belong to Class Asteroidea, characterized by the presence of five or more arms not sharply set off from a central disc.

They are free-living marine animals that occur on sandy or muddy bottoms or crawl about over rocks and shells. All are carnivorous. They in general, exhibit remarkable powers of autotomy and regeneration.

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Q42. Match the characteristic feature/terms given in column I with the phylum to which they belongs given in column II and choose the correct option.

Codes:

1. A – V; B – I; C – III; D – II; E – IV
2. A – II; B – I; C – IV; D – V; E – III
3. A – II; B – IV; C – I; D – V; E – III
4. A – III; B – IV; C – I; D – V; E – II

Answer: (d)

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Q43. The presence of joint appendages is the speciality of phylum _____

1. Echinodermata
2. Mollusca
3. Arthropoda
4. Annelidia

Answer: (c)

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Q44. What is common among silverfish, scorpion, crab and honey bee?

1. Compound eyes
2. Jointed legs
3. Metamorphosis
4. Poison glands

Answer: (a)

Silver fish, scorpion, crab and honey bee all have compound eyes. These are present on each lateral side of the head and are convex. This eye consists of numerous visual units, the ommatidia.

Each ommatidium consists of an outer cuticle covering a lens, beneath which are 68 retinal cells surrounding a light sensitive rhabdom. Adjacent ommatidia are separated by pigment cells.

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Q45. A marine cartilaginous fish that can produce electric current is

1. Trygon
2. Pristis
3. Torpedo
4. Scoliodon.

Answer: (c)

Torpedo is a bottom-living marine fish, discharging electricity which is sufficient to stun preys such as small fishes, etc.

A pair of electric organs are situated on the dorsal side of the trunk region. The electric organs are the modified lateral muscle plates innervated by the cranial nerves.

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Q46. Assertion: Cold blooded animals do not have fat layer.

Reason: Cold blooded animals use their fat for metabolic process during hibernation.

1. If both the assertion and reason are true but the reason is not a correct explanation of the assertion .
2. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Answer: (a)

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Q47. Adult Culex and Anopheles can be distinguished with the help of

1. sitting posture
2. mouth parts/colour
3. antennae/wings
4. feeding habits

Answer: (a)

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Q48. Hair occur in all mammals except those of

1. primata
2. rodentia
3. chiroptera
4. cetacea.

Answer: (d)

Order Cetacea includes whales, dolphins and porpoises. These are the most highly modified mammals.

They have a fish-like body with smooth, hairless skin devoid of sweat and oil glands, far posterior nares, small eyes, minute ear openings without pinnae, paddle-like forelimbs, no hindlimbs, abdominal testes and flattened tail ending in two horizontal flaps or flukes.

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Q49. A common characteristic of all vertebrates without exception is

1. the possession of two pairs of functional appendages.
2. the division of body into head, neck, trunk and tail.
3. body covered with exoskeleton.
4. the presence of well- developed skull.

Answer: (d)

The sub-phylum vertebrata (or craniate) have a well-developed nervous system that is differentiated into brain and spinal cord. Brain is protected by a brain box called cranium, so they are also called as craniata.

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Q50. Which one of the following is not a characteristic of Phylum Annelida?

1. Closed circulatory system
2. Pseudocoelom
3. Ventral nerve cord
4. Segmentation

Answer: (b)

Phylum Annelida comprises invertebrates, which are segmented worms having cylindrical soft bodies showing metameric segmentation. These are triploblastic animals showing bilateral symmetry.

A true coelom is present which is filled with coelomic fluid containing cells. Annelids are perhaps the first animals to have a true schizocoelic coelom.

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Q51. Which of the following animal is cold blooded and has 4 - chambered heart

1. Ornithorhynchus
2. Salamander
3. Crocodile
4. Calotes

Answer: (c)

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Q52. The body of the aschelminthes is circular in cross section. Hence, it is named as

1. Earthworm
2. Tapeworm
3. Hookworm
4. Roundworm

Answer: (d)

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Q53. Which of the following is correct about reproduction in Arthropods?

1. Internal fertilization
2. Usually dioecious, mostly oviparous
3. Some exhibit parthenogenesis
4. All of these

Answer: (d)

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Q54. When any plane passing through the central axis of the body divides the organism into two identical halves, the organism is called

1. Bilaterally symmetrical
2. Radially symmetrical
3. Asymmetrical
4. Metamerically segmented

Answer: (b)

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Q55. Frogs differ from humans in possessing:

1. hepatic portal system
2. paired cerebral hemispheres
3. nucleated red blood cells
4. thyroid as well as parathyroid

Answer: (c)

Human possesses enucleated RBC in mature state. But frog blood has both white and red blood cells which are nucleated. Frog cells do not lack platelets.

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Q56. Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

1. Sponges
2. Ctenophores
3. Coelenterates (Cnidarians)
4. Aschelminthes (round worms)

Answer: (d)

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Q57. What is common about Trypanosoma, Noctiluca, Monocystis and Giardia ?

1. They have flagella.
2. These are all parasities.
3. These are all unicellular protists.
4. They produce spores.

Answer: (c)

Protista is the kingdom of unicellular eukaryotes. The protists include heterotrophs, autotrophs, and some organisms that can vary their nutritional mode depending upon environmental conditions.

Protists occur in freshwater, saltwater, soil, and as symbionts within other organisms. Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.

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Q58. Assertion: Birds have pneumatic bones.

Reason: This reduce weight for flight.

1. If both the assertion and reason are true but the reason is not a correct explanation of the assertion .
2. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Answer: (b)

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Q59. Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is Correct?

1. Leech is a fresh water form while all others are marine
2. Penguin is homoiothermic while the remaining three are poikilothermic
3. Spongilla has special collared cells called choanocytes, not found in the remaining three
4. All are bilaterally symmetrical

Answer: (c)

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Q60. Water path in sponges is

1. Osculum → Spongocoel → Osculum
2. Ostia → Spongocoel → Osculum
3. Ostia → Spongocoel → Ostia
4. Spongocoel → Ostia → Osculum

Answer: (b)

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Q61. Which one of the following is Coelentrate?

1. Sea cucumber
2. Sea cow
3. Sea fan
4. Sea horse

Answer: (c)

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Q62. Which of the following animals is not viviparous?

1. Platypus
2. Elephant
3. Whale
4. Flying fox (Bat)

Answer: (a)

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Q63. Jelly fish belongs to Class

1. Anthozoa
2. Hydrozoa
3. Scyphozoa
4. none of these.

Answer: (c)

Jelly fish belongs to the Class Scyphozoa of the Phylum Cnidaria. Its genus is Aurelia. Aurelia is found in the coastal waters of the tropical and temperate seas. Aurelia may float passively or swim actively, singly or in shoals. It is carnivorous and unisexual.

It has a soft, gelatinous, saucerlike body. Its margin bears numerous short tentacles and 8 sense organs, called rhopalia, in notches of the margin.

Each sense organ is enclosed by a pair of leaflike lappets. At the centre of the lower (subumbrellar) surface is the squarish mouth surrounded by 4 long oral arms.

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Q64. Which of the following is commonly called ‘Pearl oyster’

1. Pinctada
2. Limulus
3. Dentalium
4. Chaetoplenura

Answer: (c)

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Q65. Assertion: Cyclostomes are marine but migrate for spawning to fresh water.

Reason: Larvae of cyclostome is metamorphosed in marine water.

1. If both the assertion and reason are true but the reason is not a correct explanation of the assertion .
2. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Answer: (c)

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Q66. The long bones are hollow and connected by air passages. They are the characteristics of

1. aves
2. reptilia
3. land vertebrates
4. mammals.

Answer: (a)

Aves are the animals that fly so their body weight should be less and for this their bones are hollow and connected by air passages. Reptilia, land vertebrates and mammals do not have hollow bones.

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Q67. Which of the following are the features of chordates?

1. Notrchord is present.
2. CNS is dorsal, hollow and single.
3. Pharynx is perforated by gill slits.
4. Heart is ventral.
5. A post-anal is present

1. All except (2)
2. All except (4)
3. All of these
4. All except (5)

Answer: (c)

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Q68. Statement 1 : Sponges belong to Porifera.

Statement 2 : Sponges have canal system.

1. Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement – 1
2. Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1
3. Statement - 1 is True, Statement- 2 is False
4. Both the Statements are False.

Answer: (a)

Sponges belong to Porifera and they have characteristic canal system.

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Q69. Match the name of the animal (Column I), with one characteristics (Column II), and the phylum / class (column III) to which it belongs :

1. (b)
2. (a)
3. (c)
4. (d)

Answer: (b)

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Q70. Which of the following feature is not correct regarding the figure given below?

1. It possesses parapodia for swimming.
2. It is an aquatic form.
3. Circulatory system is of open type.
4. Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord.

Answer: (c)

The given figure (Nereis) is an example of annelida. Annelida is a group commonly referred to as segmented worms, and they are found worldwide from the deepest marine sediments to the soils. Circulatory system is of closed type.

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Q71. Which one of the following is not a living fossil?

1. Sphenodon
2. Peripatus
3. King crab
4. Archaeopteryx

Answer: (d)

Living fossil is a term for any living species (or clade) of organism which closely resembles species otherwise only known from fossils and has no close living relatives. These species have all survived major extinction events, and generally retain low taxonomic diversities.

Some examples of living fossils in animals are – coelocanth, coral (polyp), crocodylia (crocodiles, gavials and alligators), horseshoe crab (Limulus polyphemus), monotremes (Platypus and Echidna), snoutnosed frog (Nasikabatrachus sahyadrensis). Archaeopteryx is the earliest and most primitive known bird to date.

It lived in the Jurassic Period around 150155 million years ago. It has feathers and wings but it also had teeth and a skeleton similar to a small carnivorous dinosaur, therefore, it had both bird and theropod dinosour features. Archaeopteryx is a powerful piece of evidence that shows that birds have evolved from dinosaurs.

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Q72. Which one of the following characters is not typical of the class mammalia?

1. Ten pairs of cranial nerves
2. Thecodont dentition
3. Alveolar lungs
4. Seven cervical vertebrae

Answer: (a)

Mammals have twelve pair of cranial nerves. Ten pairs of cranial nerves are present in fish and amphibians. Reptiles and birds also have 12 pairs of cranial nerves.

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Q73. Special character of coelenterates is

1. nematocysts
2. polymorphism
3. flame cells
4. hermaphroditism

Answer: (a)

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Q74. Which of the following is correct about reproduction in sponges?

1. Fertilization is internal
2. The mode of asexual reproduction such as gemmule formation, budding and fragmentation.
3. Development is indirect
4. All of these

Answer: (d)

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Q75. How many species named on earth is arthropoda?

1. $2/3$
2. $1/2$
3. $1/4$
4. $3/4$

Answer: (a)

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Q76. Annual migration does not occur in the case of

1. Salamander
2. Siberian crane
3. Arctic tern
4. Salmon

Answer: (a)

Salamander does not undergo any annual migration as it occurs in Siberian crane, Arctic tern and Salmon mainly for the search of food or for breeding.

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Q77. Ascaris is characterized by

1. absence of true coelom but presence of metamerism
2. presence of true coelom but absence of metamerism
3. presence of true coelom and metamerism (metamerisation)
4. presence of neither true coelom nor metamerism.

Answer: (d)

Ascaris belongs to the Phylum Nematoda of Superphylum Aschelminthes. They have a cylindrical body without showing any metamerism, a pseudocoel (false coelom) and a complete digestive tract lined by endodermal epithelium. The cuticle covering the body surface bears minute transverse striations giving a pseudosegmented appearance to the worm.

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Q78. Which one of the following pairs of animals comprises ‘jawless fishes’?

1. Lampreys and hag fishes
2. Mackerals and Rohu
3. Guppies and hag fishes
4. Lampreys and eels

Answer: (a)

Lampreys and hag fishes are unusual, jawless fish that comprise the order Cyclostomata, so named because of the circular shape of the mouth. The brains of lampreys and hagfishes differ a lot, but they also show a large number of similarities, as do all craniate brains.

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Q79. Assertion:
Snake shed their scale as skin cast.
Reason:
It allow continue growth of snake.

1. If both the assertion and reason are true but the reason is not a correct explanation of the assertion .
2. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Answer: (b)

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Q80. A chordate character is

1. post-anal tail
2. gills
3. spiracles
4. chitinous exoskeleton.

Answer: (a)

The diagnostic characters of chordates are notochord, dorsal hollow nerve cord, pharyngeal slits and post anal tail. Tail is the part of the body behind the cloacal or anal opening. It contains skeletal elements, muscles, blood vessels and nerves but no viscera.

It provides much of propulsive force in aquatic species. The tail is reduced or absent in the adults of some chordates.

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Q81. Which of the following features in birds indicates their reptilian ancestry?

1. Four-chambered heart
2. Eggs with a calcareous shell
3. Scales on their hind limbs
4. Two special chambers-crop and gizzard in their digestive tract

Answer: (a)

Four chambered heart in birds indicates their reptilian ancestry.

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Q82. Necturus is

1. mud puppy
2. hell bender
3. congo eel
4. blind worm.

Answer: (a)

Necturus is a mud puppy belonging to the Order Urodela of Class Amphibia. Hellbender is a large salamander. Amphiuma is a Congo Eel and Ichthyophis is a blind worm.

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Q83. Metameric segmentation is the characteristic of

1. echinodermata and annelida
2. mollusca and chordata
3. platyhelminthes and arthropoda
4. annelida and arthropoda.

Answer: (d)

The term metamerism refers to a linear repetition of parts in an animal body. It occurs in three highly organized phyla : Annelida, Arthropoda and Chordata. Each segment is called a metamere, or somite.

Segmentation often affects both external and internal structures. Such a condition is called metameric segmentation. In chordates, the segmentation is apparent only in the embryonic stage. In the adult chordates, segmentation is visible in the internal structures, such as vertebrae, ribs, nerves and blood vessels.

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Q84. Which one of the following sets of animals belongs to a single taxonomic group?

1. Bat, Pigeon, Butterfly
2. Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish
3. Monkey, Chimpanzee, Man
4. Silkworm, Tapeworm, Earthworm

Answer: (c)

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Q85. Which of the following is the largest phylum?

1. Echinodermata
2. Mollusca
3. Arthropoda
4. Annelida

Answer: (c)

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Q86. The early stage human embryo distinctly possesses

1. Gill slits
2. Gills
3. External ear (pinna)
4. Eye brows

Answer: (a)

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Q87. Gorilla, chimpanzee, monkeys and humans belong to the same

1. family
2. species
3. genus
4. order.

Answer: (d)

Gorilla, chimpanzee, monkeys and humans belong to the same Order i.e., Primates. They have well developed brain, flat nails on fingers and toes. First digit is usually opposable, an adaptation for grasping. Eyes are typically large and turned forward.

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Q88. Find out the incorrect matching:

1. (a)
2. (b)
3. (c)
4. (d)

Answer: (d)

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Q89. Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

1. Leech is a fresh water form while all others are marine.
2. Penguin is homoiothermic while the remaining three are poikilothermic.
3. Spongilla has special collared cells called choanocytes, not found in the remaining three.
4. All are bilaterally symmetrical.

Answer: (c)

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Q90. Sycon belongs to a group of animals, which are best described as

1. multicellular having tissue organization, but no body cavity
2. multicellular with a gastrovascular system
3. unicellular or acellular
4. multicellular without any tissue organization

Answer: (d)

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Q91. Select the total number of organism which posses two chambered heart and are poikilothermal.

"Scoliodon, Pristis, Clarias, Betta, Pterophyllum, Echinus, Devil Fish, Cuttle fish, Sea lily, Hyla, Labeo, catla, Torpedo, Trygon"

1. 9
2. 7
3. 11
4. 13

Answer: (a)

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Q92. Metagenesis refers to :

1. Presence of different morphic forms
2. Presence of a segmented body and parthenogenetic mode of reproduction
3. Alternation of generation between asexual and sexual phases of an organism
4. Occurrence of a drastic change in form during post-embryonic development

Answer: (c)

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Q93. Which of the following characteristic is probably most responsible for the great diversification of insects on land?

1. Bilateralsymmetry
2. Segmentation
3. Antennae
4. Exoskeleton

Answer: (d)

Exoskeleton is probably the most responsible for the great diversification of insects on land. An exoskeleton is the external skeletons that supports and protects an animal's body, in contrast to the internal skeleton (endoskeleton) of, for example, a human.

Examples of exoskeleton animals include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters.

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Q94. The below diagram shows the germs layer. The animals having structures shown in the figures A and B are respectively called–

1. Triploblastic, Diploblastic
2. Diploblastic, Triploblastic
3. Diploblastic, Diploblastic
4. Triploblastic, Triploblastic

Answer: (b)

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Q95. Match the following columns and select the correct option.(A)(B)(C)(D)

1. (iv) (ii) (iii) (i)
2. (ii) (iii) (iv) (i)
3. (iii) (iv) (i) (ii)
4. (i) (iv) (iii) (ii)

Answer: (b)

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Q96. The following group is not a subphylum of Chordata

1. Tetrapoda
2. Urochordata
3. Cephalochordata
4. Vertebrata

Answer: (a)

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Q97. Select the living fossil from the following:

1. Silkworm
2. Culex
3. Lac insect
4. Limulus

Answer: (d)

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Q98. Which of the following pairs of animals has non-glandular skin?

1. Chameleon and turtle
2. Snake and frog
3. Frog and pigeon
4. Crocodile and tiger

Answer: (a)

Chameleon and turtle belong to class–Reptillia and possess dry and non-glandular skin with scales. Frog, pigeon and tiger possess modifications in their skin according to the adaptations in their respective habitats.

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Q99. Which one of the following characters is not typical of the class Mammalia?

1. Alveolar lungs
2. Thecodont dentition
3. Ten pairs of cranial nerves
4. Seven cervical vertebrae

Answer: (c)

Mammals have 12 pairs of cranial nerves.

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Q100. Besides annelida and arthropods, the metamerism is exhibited by

1. cestoda
2. mollusca
3. acanthocephala
4. chordata.

Answer: (d)

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