First slide

Classification of Animals

Question

Which of the following features is common to Ascaris and cockroach?

Easy

A

Pseudocoelom
B

Sexual dimorphism
C

Nephridia
D

Dorsal tubular nerve cord

Solution

Both Ascaris and cockroach exhibit sexual dimorphism. The female Ascaris is longer than the male, has a straight tail and lacks a cloaca and copulatory spicules. The male cockroach has anal styles which are absent in the female.

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