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RideAnS [48]
4 years ago
12

The common ancestor of the protostomes had a coelom. what does this suggest?

Biology
1 answer:
posledela4 years ago
3 0
This suggests that the body cavity (coelum) evolved before the lophophore. Protostomes are one of the groups of animals having a true body cavity and are believed to share a common ancestor. They include annelids, mollusks, and arthropods. Lophophore is an organ characteristic of aquatic invertebrates (protostomes) that functions in filter feeding, it consists of a ridge of hollow tentacles bearing cilia, which waft food particles into the mouth.<span />
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