Sponges are Believed to Have Arisen from the Choanoflagellates Because

Question

Sponges are believed to have arisen from the choanoflagellates because they possess:
A) amebocytes
B) collar cells
C) spongin
D) spicules
E) oscula

Accepted Answer

Sponges are believed to have arisen from choanoflagellates because both possess collar cells (choanocytes in sponges), which are similar in structure and function, suggesting a common ancestry. These cells are used for feeding and are characteristic of both groups.