Question

Choose the correct statements:
Statements:
A. Many echinoderms are able to regenerate lost parts.
B. In many echinoderms, respiration and waste removal takes place by means of skin gills.
C. Sea urchins lack distinct arms but have the same five-part body plan as all other echino derms.
Choose the correct answer from the options given below:

• A. (A), (B), and (C)
• B. (B) and (C) only
• C. (A) and (B) only
• D. (A) and (C) only

Hint:

Echinoderms, such as sea stars and sea urchins, exhibit radial symmetry and a unique water vascular system for locomotion and feeding.

Answer 1

The Correct Option is A

The following statements accurately describe echinoderm characteristics, such as regeneration, respiratory skin gills, and a pentamerous body plan.

• (A): Echinoderms, exemplified by sea stars, exhibit a notable capacity to regenerate lost appendages or body sections, a fundamental biological trait.
• (B): Echinoderms perform respiration and waste removal via dermal branchiae (skin gills), which are coelomic extensions.
• (C): Sea urchins, as echinoderms, display pentamerous radial symmetry, common to the phylum; however, unlike sea stars, they do not possess distinct arms.