Read the following 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:
- 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
Solution & Step-by-step Explanation
1. (a) is incorrect: Metagenesis (alternation of generation) is observed in Cnidarians like Obelia, not Helminths.
2. (b) is correct: Echinoderms are triploblastic and possess a true coelom.
3. (c) is correct: Aschelminthes (round worms) are the first to show organ-system level of organization.
4. (d) is incorrect: Comb plates in Ctenophores are for locomotion, not digestion.
5. (e) is correct: The water vascular system is a unique feature of Phylum Echinodermata.
Statements (b), (c), and (e) are correct.
2. (b) is correct: Echinoderms are triploblastic and possess a true coelom.
3. (c) is correct: Aschelminthes (round worms) are the first to show organ-system level of organization.
4. (d) is incorrect: Comb plates in Ctenophores are for locomotion, not digestion.
5. (e) is correct: The water vascular system is a unique feature of Phylum Echinodermata.
Statements (b), (c), and (e) are correct.