Examlex
An arête is a sharp ridge that forms between two glacial cirques.
Lophotrochozoa
A branch of the protostomes that includes the flatworms, nemerteans (proboscis worms), mollusks, annelids, and the lophophorate phyla.
Ecdysozoa
A branch of the protostomes that includes animals that molt, such as the rotifers, nematodes, and arthropods.
Protostomes
A group in the animal kingdom characterized by the mouth developing before the anus during embryonic development.
Coelom
A fluid-filled body cavity found in most multicellular animals that is lined by tissue derived from mesoderm.
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