Ctenophores are eumetazoans that lack most of the Hox genes found in all other eumetazoans.They have a radially symmetrical body plan, are diploblastic, and have cells organized into tissues.Based on this information, which of the following is the most appropriate group in which to classify the ctenophores?

Question

Quizplus · Accepted Answer

Ctenophores lack most of the Hox genes found in all other eumetazoans, indicating that they are not closely related to deuterostomes, bilaterians, or protostomes. Their radially symmetrical body plan and diploblastic organization also set them apart from sponges. Therefore, the most appropriate group in which to classify the ctenophores is as the sister group to all other animals.

Ctenophores Are Eumetazoans That Lack Most of the Hox Genes