Question

A land snail, a clam, and an octopus all share:

• A. a mantle
• B. a radula
• C. embryonic torsion
• D. distinct cephalization

Answer 1

Answer: (A)

a mantle

The mantle is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps. In clams, it is located midway on the anterior surface of the shell. In octopus and land snails the mantle protects the organs and helps with respiration and contraction.

So, the correct option is 'mantle'.