Question

Identify true statements:
(A) Cnidarians have blind-sac body plan.
(B) Digestion in Ctenophora is intra as well as extracellular.
(C) Agnathans are endoparasites on fishes.
(D) Ichthyophis belongs to Tetrapoda group.

• A. A, C and D
• B. A, B and D
• C. B and D
• D. A and D

Answer 1

Answer: (B)

Cnidarians have blind-sac body plan (in this plan, the body is sac-like with a digestive cavity which opens outside by only one aperture, which functions as mouth and anus).
In Ctenophora, digestion is both extracellular and intracellular and wastes are voided (removed) via both the mouth and the anus.
Ichthyophis is a genus of caecilians, belongs to Tetrapoda group (limbless amphibians, sometimes called the Asian caecilians) found in Southeast Asia, the southern Philippines, and the western Indo-Australian Archipelago.
Agnathans have only one living class identified called Cyclostomata. All living members of the class Cyclostomata are ectoparasites on some fishes.