Question

The following figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.

• A. (a) and (d) have cindoblasts for self-defence.
• B. (c) and (d) have true coelom.
• C. (a) and (b)respire mainly through body wall.
• D. (b) and (c) show radial symmetry

Answer 1

The correct option is B (c) and (d) have true coelom.

(a) Taenia (human tapeworm) belong to the phylum Platyhelminthes.

(b) Aurelia belongs to phylum Coelenterata. Both of them are acoelomate.

(c) Octopus belongs to phylum Mollusca. Phylum Mollusca is characterized by features like body bilaterally symmetrical, triploblastic, coelomate.

(d) Scorpion belongs to phylum Arthropoda. Phylum Arthropoda is characterized by features like body triploblastic, coelomate, bilaterally symmetrical and metamerically segmented.

Thus, option B is the correct answer.