Question

Read the following statements
(i) True coelom is a body cavity which arises as a cavity in the embryonic mesoderm.
(ii) Digestive cavity is found in acoelomates, pseudocoelomates as well as coelomates.
(iii) The body cavity of arthropods and non-cephalopod molluscs is called haemocoel.
(iv) Aschelminthes possess true body cavity.
(v) There is no cavity between the body wall and gut in Echinoderms.
Which of the statements are correct?

• A. (i), (iii)
• B. (i), (ii), (iii)
• C. (iv), (v)
• D. (i), (iv), (v)

Answer 1

The correct option is A (i), (iii)

i) True coelom arises from the mesoderm and is lined by mesoderm on both sides.

ii) Digestive cavity is not found in acoelomates.

iii)Haemocoel is the cavity seen in arthropods and non cephalopod molluscs.

iv) Aschelminthes have pseudocoeloms.

v) Echinoderms possess true body cavity.

Hence the correct option is A.