Question

17. In Amphioxus excretion takes place by
(A) Flame cells
(B) Protonephridium
(C) Myotomes
(D) Kidney​

Answer 1

Answer:

Correct option is

B

Protonephridium

Explanation:

Protonephridia or flame cells are the excretory structures in Platyhelminthes (Flatworms, e.g., Planaria), rotifers, some annelids and the cephalochordate Amphioxus. Protonephridia are primarily concerned with ionic and fluid volume regulation, i.e., osmoregulation.

So, the correct answer is option B.

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