A scientist is studying some developing eggs from an ocean sample.The early embryos have divided only a few times,and all cells look identical.When the scientist carefully removes half the cells from an embryo,both clumps of cells are able to complete development,forming twins.The eggs can be identified as
A)deuterostomes.
B)protostomes.
C)crustaceans.
D)cnidarians.
E)echinoderms.

Question

Quizplus · Accepted Answer

The ability of the early embryos to form identical twins indicates that they are deuterostomes, which have indeterminate cleavage and the ability to form identical twins. Protostomes, on the other hand, have determinate cleavage and cannot form identical twins. Crustaceans, cnidarians, and echinoderms are all invertebrate groups with different types of embryonic development that do not involve the formation of identical twins.

A Scientist Is Studying Some Developing Eggs from an Ocean