Which cleavage type is seen in echinoderms?

Explanation

Correct answer: (a) Radial Explanation: Echinoderms exhibit radial cleavage, where divisions occur symmetrically around the axis of the egg. Information Booster: Radial cleavage occurs in deuterostomes like echinoderms and chordates. The cleavage planes divide the egg into equally arranged cells. It supports a more organized embryonic development. This symmetry is important for the correct positioning of cells. It is distinct from spiral cleavage in protostomes.