Question

Which of the following is acoelomate ?

• A. Both (A) and (C)
• B. Chordata
• C. Echinodermata
• D. Platyhelminthes

Answer 1

The correct option is D Platyhelminthes

Presence or absence of a cavity between the body wall and the gut wall is very important in classification. The body cavity, which is lined by mesoderm is called coelom. Animals possessing coelom are called coelomates.
The animals in which the body cavity is absent are called acoelomates.
Platyhelminthes are acoelomate while Echinodermata and Chordata are coelomates.
So, the correct answer is- Platyhelminthes