Question

why it is called that sponges are on a blind branch of evolutionary tree?​

Answer 1

Answer:

Sponges are often placed under a separate group called “Parazoa” which means side animals. Sponges have not given rise to any higher phyla so these are considered to be on a blind branch of evolutionary tree. ... Sponges originated some 600 million years ago. About 10,000 species of sponges are present today.

pls mark as brainliest