NEET 2021 · BiologyEchinodermataPrevious Year Question
Read the following statements. Statements: (a) Metagenesis is observed in Helminths. (b) Echinoderms are triploblastic and coelomate animals. (c) Round worms have organ-system level of body organization. (d) Comb plates present in ctenophores help in digestion. (e) Water vascular system is characteristic of Echinoderms. Choose the correct answer from the options given below.
Answer: (B) (b), (c) and (e) are correct. Statement (b) is correct: echinoderms are triploblastic and coelomate.
- A.(a), (d) and (e) are correct
- B.(b), (c) and (e) are correct✓
- C.(c), (d) and (e) are correct
- D.(a), (b) and (c) are correct
Correct Answer
(B) (b), (c) and (e) are correct
Solution & Explanation
Statement (b) is correct: echinoderms are triploblastic and coelomate. Statement (c) is correct: roundworms (Aschelminthes) have organ-system level of organisation. Statement (e) is correct: the water vascular system is the most distinctive feature of echinoderms. Statement (a) is wrong because metagenesis occurs in Cnidaria (e.g., Obelia), not helminths, and (d) is wrong because comb plates aid locomotion, not digestion. Hence option B. NCERT Reference: Page 45, line 18
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