FREE NEET Biology Practice MCQ Test: Animal Kingdom Exercise 1 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Answer: (b)

Platyhelminthes do not have body cavity so they are acoelomates. In annelids, the body cavity is true and schizocoelous. Both annelids and platyhelminthes have bilateral symmertry

Answer: (c)

Answer: (b)

Dentary is a membrane bone, present in the lower jaw of the vertebrates, that supports the teeth. In mammals the dentary is the sole bone of the lower jaw. The dentary bone is relatively short comma shaped bone.

Answer: (c)

Answer: (c)

Solenocytes are also called flame cells. It is a cup shaped cell which contains group of cilia and this is the main excretory organ of platyhelminthes.

Answer: (a)

Answer: (d)

Answer: (d)

Answer: (b)

In insects Malpighian tubules are attached to the alimentary canal at the extreme anterior end of hindgut. These are fine, long, unbranched, yellowish and blind tubules lying freely in the haemolymph. These are between 60 to 150 in number and are arranged in 68 bundles. These excrete out nitrogenous wastes from the body in the form of uric acid.

Answer: (d)

Amoeba is a fresh water protozoan containing contractile vacuole that is meant for osmoregulation. When Amoeba is placed in a marine water, then the water from the contractile vacuole will move out resulting in decrease in size of it. Contractile vacuole will increase in size if it is placed in hypotonic solution. Water will enter into contractile vacuole, thus increasing its size and ultimately it will burst and disappear.

Answer: (c)

Similar body halves could be obtained with either radial or biradial symmetry. Spherical symmetry has no main body axis along which to cut, and bilateral symmetry produces mirror-image halves.

Answer: (a)

Tortoise belongs to the Class Reptilia. Its body is protected by a shell consisting of a dorsal carapace and ventral plastron.

Answer: (d)

Answer: (a)

Answer: (a)

Answer: (a)

In poriferans (sponges) choanocytes (collar cells) form lining of spongocoel. Flagella present in collar cells provide circulation to water in water canal system.

Answer: (a)

Ctenophora is a small phylum of exclusively marine, invertebrate animals. Ctenoplana and Beroe are examples of ctenophora. They have biradial symmetry (a combination of radial and bilateral symmetries). They lack the specialized stinging cells (nematocysts) found in coelenterates, but one species (Haeckelia rubra) incorporates those of its jellyfish prey for its defense.

Answer: (b)

All birds are oviparous while all mammals except Ornithorhyncus (duck billed platypus) and Echidna or Tachyglossus (spiny anteater) are viviparous.

Answer: (c)