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Q.

Which of the following features is not present in Periplaneta americana?

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a

Exoskeleton composed of N-acetylglucosamine

b

Metamerically segmented body

c

Schizocoelom as body cavity

d

Indeterminate and radial cleavage during embryonic development

answer is D.

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Detailed Solution

Indeterminate and radial cleavage during embryonic development is not a feature of Periplaneta americana.

The cockroach undergoes protostome development. Protostomes undergo spiral cleavage at the eight-celled stage and show determinate development, in which the development fate of each cell in the adult organism is already determined.

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