Sponges are believed to have arisen from the choanoflagellates because they possess:

Name: Sponges are believed to have arisen from the choanoflagellates because they possess:
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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.

Sponges Are Believed to Have Arisen from the Choanoflagellates Because