FREE NEET Biology Practice MCQ Test: Animal Kingdom Exercise 4 Questions Answers With Detailed Explanations [PDF]

Answer: (d)

Answer: (a)

Arthropods are the largest phylum of Kingdom Animalia that characteristically possesses an outer body layer – the cuticle. The body is composed of segments usually forming distinct specialized body regions, i.e., head, thorax and abdomen. In them the trachea or windpipe or book lungs are the respiratory organs found in terrestrial forms, which help in respiration.

Answer: (b)

Starfish belongs to the phylum echinodermata who have developed tube feet for locomotion. The tube feet generally protrude out through special radial areas called ambulacra. They are extended and retracted by variations in hydraulic pressure of fluid in them and by contractions of their muscles.

Cuttle fish belongs to the Phylum Mollusca and it swims. Crayfish belongs to the Phylum Arthropoda in which locomotion occurs by jointed appendages. Jelly fish belongs to the Phylum Cnidaria and it swims.

Answer: (a)

Answer: (c)

Petrormyzon marinus, common ly kn own as sea lampr eylays eggs in fresh water and its larvae, after metamorphosis, return to the ocean (saline water).

Answer: (b)

Main component of bone is collagen which is a complex combination of amino acids. When frog's bone is treated with HCl, these compounds are broken down and the bone becomes flexible.

Answer: (a)

Answer: (b)

Aschelminthes is a superphylum consisting of pseudocoelomates. These are mostly aquatic, free living or parasitic. Their body is slender, bilaterally symmetrical and triploblastic.

Answer: (d)

Answer: (b)

Platyhelminthes includes flat warms. There is no body cavity. The animals are therefore acoelomates. Annelids also have bilateral symmetry. They are coelomate having a perivisceral cavity divided into compartments.

Answer: (a)

Sympathetic nervous system forms a part of autonomic nervous system that consists of nerves which connect the visceral receptors and effectors with the central nervous system through the crania and spinal nerves. Sympathetic nerves arise from thoracolumbar nerves.

Answer: (d)

Answer: (c)

Answer: (b)

Sponges belong to the Phylum Porifera. Ostia, spongocoel and osculum together form a canal system which is characteristic of all sponges. Canal system of Leucosolenia is of ascon type. It is the simplest type of canal system found in sponges. Water enters directly through ostia into the central spongocoel, which is lined by choanocytes and leaves through osculum. Sycon type of canal system is found Sycon and Leucon type is found in Spongilla. There is no canal system named as radial type.

Answer: (b)

Answer: (c)

Torpedo is a bottomliving 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. Infact the electric organs are the modified lateral muscle plates innervated by the cranial nerves.

Answer: (c)

Penguins are a group of aquatic, flightless birds living almost exclusively in Antarctica. All penguins are countershaded that is, they have a white underside and a dark (mostly black) upperside. This is for camouflage.

Answer: (b)

Answer: (d)

Answer: (d)

There are about 450 mature proglottids forming the middle part of strobila. These are large and squarish in outline. The anterior 100 to 150 proglottids contain only male reproductive organs, while the posterior 250 mature proglottids develop both male and female reproductive organs making them hermaphrodite.