Q 149

149.  Porifera are said to have evolved from 

(1)  Trilobita                                      (2)  Rotifera
(3)  Choanoflagellates                       (4)  Protostomes

Dear student, 
Please find below the solution to the asked query        

Porifera are said to have evolved from Choanoflagellates.
This topic is debatable. But according to some scientists, there are similarities between the choanocyte cells of poriferans and cells of choanoflagellates and so they have concluded that the poriferans have evolved from Choanoflagellates.
Hence, option (3) is correct.

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