Question
Question: Which of the following is correct about protonephridia / flame cells?...
Which of the following is correct about protonephridia / flame cells?
A
Protonephridia are the excretory structures in platyhelminthes (e.g. Planaria), rotifers and some annelids
B
Protonephridia are the excretory structures in the cephalochordes e.g. Amphioxus
C
Protonephridia are primarily concerned with ionic and fluid volume regulation i.e. osmoregulation
D
All
Answer
All