Question

In contrast to annelids, the Platyhelminthes show:

• A. Radial symmetry
• B. Presence of pseudocoel
• C. Bilateral symmetry
• D. Absence of body cavity

Answer 1

The correct option is D Absence of body cavity

Platyhelminthes are acoelomate animals, characterized by the absence of coelom while annelids are true coelomate having a well-developed schizocoelous coelom. The acoelomate animals lack the body cavity between body walls and the digestive tract.

So, the correct answer is option D.