Question

Which of the following characters define the members of Platyhelminthes?

• A. They are diploblastic, radially symmetrical and coelomate.
• B. They are diploblastic, radially symmetrical and acoelomate.
• C. They are triploblastic, bilaterally symmetrical and acoelomate.
• D. They are triploblastic, bilaterally symmetrical and pseudocoelomate.

Answer 1

Answer: (C)

They are triploblastic, bilaterally symmetrical and acoelomate.

Phylum Platyhelminthes includes both parasitic and non-parasitic flatworms. They are bilaterally symmetrical and triploblastic (presence of three fundamental cell layers). They lack a body cavity and thus are called acoelomates.

So, the correct answer is option C.