Deuterostomes are

Deuterostomes are

• A. Enterocoelomates
• B. Schizocoelomates
• C. Radial
• D. Bilateral

Answer: (A)

Deuterostomes are defined by how the body cavity forms during embryonic development: the coelom develops when outpockets of the gut (the archenteron) pinch off to become the body cavity. This enterocoelic formation, along with the pattern that the blastopore becomes the anus (mouth forms later), distinguishes them from other groups. The key idea is that the coelom arises from gut-derived pouches rather than from splitting of mesoderm, which is why deuterostomes are described as enterocoelomates.

Deuterostomes are defined by how the body cavity forms during embryonic development: the coelom develops when outpockets of the gut (the archenteron) pinch off to become the body cavity. This enterocoelic formation, along with the pattern that the blastopore becomes the anus (mouth forms later), distinguishes them from other groups. The key idea is that the coelom arises from gut-derived pouches rather than from splitting of mesoderm, which is why deuterostomes are described as enterocoelomates.