Classes of Animals MCQs with Answers

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Actinopods move by pseudopods (false feet), which are temporary cytoplasmic extensions used for locomotion and feeding.

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The muscles that support fins are devoid of mesoderm.

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Wings of birds and flying lizards are an example of convergent evolution, where unrelated species independently evolve similar traits due to similar environmental pressures.

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The single large opening at the top of the spongocoel is called the osculum.

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Non-polar neurons are seen in sponges (Phylum Porifera), which lack a true nervous system and have no distinct dendrites or axons.

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The life cycle of the bee follows Egg → larva → pupa → bee, which is a complete metamorphosis.

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In Sycon, the radial canal is mainly lined by choanocytes (collar cells), which are flagellated cells responsible for generating water current and capturing food particles.

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Yellow cytoplasm in Ascidian cells gives rise to muscle cells.

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Duck-billed platypus and spiny anteater are oviparous mammals, meaning they lay eggs despite having internal fertilization.

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Pectoral fins in fish are categorized as paired fins, as they occur in a pair on either side of the body.