Q.

Select the group of vertebrates that are oviparous and undergo direct development.

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a

Echinoderms

b

All mammals

c

Cyclostomes

d

Aves

answer is B.

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Detailed Solution

Birds are egg-laying (oviparous) with direct development.

Platypus is an egg-laying mammal.

Echinoderms and cyclostomes exhibit indirect development.

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