Question

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

(a) Exoskeleton composed of N­acetylglucos­ amine

(b) Metamerically segmented body

(c) Schizocoelom as body cavity

(d) Indeterminate and radial cleavage during embryonic development

Answer 1

Ans: (d) Indeterminate and radial cleavage during embryonic development

Sol. In cockroach, determinate and spiral cleavage is found during embryonic development, not indeterminate and radial cleavage.