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

1. Schizocoelom as body cavity
2. Indeterminate and radial cleavage during embryonic development
3. Exoskeleton composed of N-acetylglucos-amine
4. Metamerically segmented body

Correct answer: Indeterminate and radial cleavage during embryonic development

Solution

Periplaneta americana is an arthropod, so it has a chitinous exoskeleton, a segmented body, and a body cavity derived from the embryonic mesoderm. Its embryonic cleavage is not indeterminate and radial; that pattern is characteristic of deuterostomes, not cockroaches.

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