Question

From the given figure of cross section of the body of an invertebrate, identify the animal, which has this body plan?

• A. Cockroach
• B. Round worm
• C. Planaria
• D. Earth worm

Answer 1

The correct option is C Planaria

Planaria is the flatworm. The appearance of the cross-section here resembles planaria which are an acoelomate. The center of the diagram here is a clear, unstained area which is the reversible pharynx and is the digestive system.
Parenchyma is the tissue that fills the body cavity between the organs and the epidermis.
So, the correct answer is option C.