Question

multiple choice question
in most protostomes, the first indentation of the gastrula develops into the ____ and the second opening becomes the __ while in deuterostomes the __ is the first opening and the ____ is the second.
o mouth; anus; anus, mouth
o heart; anus; anus; heart
o anus; heart; heart; anus
o anus; mouth; mouth; anus

Explanation:

In protostomes, the first indentation (blastopore) develops into the mouth and the second opening becomes the anus. In deuterostomes, the blastopore (first opening) becomes the anus and the second opening becomes the mouth.

Answer:

mouth; anus; anus, mouth