Question

Ascaris and Periplaneta resemble each other in

• A. Pseudocoel
• B. Sexual dimorphism
• C. Nephridia
• D. Dorsal tubular nerve cord

Answer 1

The correct option is B Sexual dimorphism

A) $\text{Ascaris}$ (roundworm) has a pseudocoel while Periplanata (cockroach) has a true coelom.

B) Both $\text{Ascaris}$ and $\text{Periplanata}$ show sexual dimorphism (male and female individuals are present).

C) Neither $\text{Ascaris}$ nor $\text{Periplanata}$ have nephridia. $\text{Ascaris}$ has renette glands and $\text{Periplanata}$ has malpighian tubules for excretion.

D) Both have a ventral, solid nerve cord.

So, the correct answer is 'Sexual dimorphism'.