Which of the Following are NOT Protostomes

Question

Which of the following are NOT protostomes?
A) Clams
B) Earthworms
C) Crabs
D) Spiders
E) Milkfish

Accepted Answer

Protostomes are a group of animals characterized by a specific pattern of development, including the mouth forming before the anus during embryonic development. Clams, earthworms, crabs, and spiders are all examples of protostomes. Milkfish, however, are not protostomes; they are part of the group known as deuterostomes, which includes vertebrates like fish, birds, mammals, etc., where the anus forms before the mouth during development.