2016 Structural Organisation in AnimalsCockroach – features Medium Question 47 of 92 in Structural Organisation in Animals

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

A Indeterminate and radial cleavage during embryonic development.
B Exoskeleton composed of N-acetylglucosamine.
C Metamerically segmented body.
D Schizocoelom as body cavity.

The answer is A.

Solution

Arthropods (protostomes) show determinate spiral cleavage.

During embryonic development, $Periplaneta\ americana$ shows determinate cleavage, not indeterminate and radial cleavage. It develops into a nymph similar to its parent.

Concept cockroach-determinate-cleavage

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92 questions from this chapter have appeared across 26 exam years.