Question

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

Answer 1

Indeterostomes have indeterminate and radial cleavage. whereas cockroches are protostomes. Protostomes feature a spiral (denotes the circular pattern of the dividing cells) and determinate (each cell has a specific fate) cleavage. and their mouth develops before the anus. Hence indeterminate and radial cleavage is not a feature of Periplaneta americana.

Final answer

(b) Indeterminate and radial cleavage during embryonic development