What is true of coelom development in protostomes?Multiple choice question.The coelomic cavity develops embryologically between the mesoderm and endoderm.Mesodermal cells move apart to form the coelomic cavity.Groups of mesodermal cells pouch off the end of the archenteron to form the coelomic cavity.The coelomic cavity forms from an indentation of a hollow ball of cells during embryonic development.
Question
What is true of coelom development in protostomes?Multiple choice question.The coelomic cavity develops embryologically between the mesoderm and endoderm.Mesodermal cells move apart to form the coelomic cavity.Groups of mesodermal cells pouch off the end of the archenteron to form the coelomic cavity.The coelomic cavity forms from an indentation of a hollow ball of cells during embryonic development.
Solution
The correct answer is: "Mesodermal cells move apart to form the coelomic cavity."
In protostomes, which include many invertebrates like mollusks and annelids, the coelom (body cavity) forms by a process called schizocoely. During this process, a block of mesodermal cells (middle layer of embryonic cells) splits apart and hollows out to form the coelomic cavity. This is different from the process in deuterostomes, where the coelom forms by outpouching and pinching off of the gut, or archenteron. The other options provided do not accurately describe coelom development in protostomes.
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