Enterocoelom appeared first in the course of evolution in
A
starfish
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B
earthworm
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C
fishes
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D
roundworms
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Solution
The correct option is A starfish Starfish belongs to the phylum Echinodermata which is a link between non-chordates and chordates. Enterocoelom appeared first in the course of evolution in Echinoderms in the course of evolution. The mesoderm arises from the enteron during the gastrula stage of the embryo. Enterocoel is a type of true coelom condition in which the coelom forms from pouches. It is “pinched” off from the digestive tract. It is also known as embryonic gut or archenteron.