Classes of Animals MCQs with Answers

One-liner

There are five known classes of vertebrates.

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Femoral glands are found in reptiles, particularly in lizards and some other squamates.

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In the taxonomic hierarchy, Class encompasses all the others in the list because it is the highest-ranking category among the given options.

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The class of animals adapted for living exclusively in water and possessing gills is Fish.

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The body wall of sponges consists of two layers: the outer pinacoderm and the inner choanoderm.

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Planula larva belongs to Porifera (sponges) and Pluteus larva belongs to Echinodermata (e.g., sea urchins) — so the correct answer is Both A and B.

One-liner

Kangaroos belong to the group Metatheria, which includes all marsupial mammals.

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Animals are classified into 2 main groups: vertebrates (with backbone) and invertebrates (without backbone).

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Chordates share many features of embryonic development with echinoderms, but have evolved separately for at least 500 million years.

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Excretion in annelids takes place by specialized structures called nephridia.