Classes of Animals MCQs with Answers

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The pupa of a bee is also called a cocoon.

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In deuterostome development, cleavage is radial and indeterminate.

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The three germ layers — ectoderm, mesoderm, and endoderm — are formed during the Gastrula stage of embryonic development.

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Ray-finned fishes originated during the Silurian period (444 to 416 million years ago).

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The question contains a factual error — bat is not a bird; it is a mammal, and pigeons (along with doves and flamingos) are birds that produce crop milk to feed their young.

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Spider is the odd one out because it is an arachnid (with 8 legs), while Bee, Moth, and Ant are all insects (with 6 legs).

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Elephant is the odd one out because Leopard, Tiger, and Lion are all carnivorous cats (family Felidae), while the Elephant is a herbivorous mammal belonging to a different order (Proboscidea).

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Sea cucumbers lack spines, have a very reduced endoskeleton, and do not look much like other echinoderms.

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A cockroach has 12 heart chambers arranged in a tubular structure along its body.

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A honey bee has 6 legs.