Question

What is the name for all animals that have a type of embryonic development where the original opening in the blastula develops into the mouth, such as simple animals like earthworms and insects?

A) Protostomes
B) Deuterostomes
C) Ectotherms
D) Endotherms

Answer 1

Protostomes are the name for all animals that have a type of embryonic development where the original opening in the blastula develops into the mouth. This group includes arthropods, mollusks, and annelids. Deuterostomes, on the other hand, have their blastopore develop into the anus.

Step-by-step explanation:

The name for all animals that have a type of embryonic development where the original opening in the blastula develops into the mouth is Protostomes. Protostomes include phyla such as arthropods, mollusks, and annelids. In contrast, Deuterostomes include chordates and echinoderms, and their blastopore develops into the anus.