The first animals with simple nerve nets probably evolved about _________ years ago.
A) 4.5 billion
B) 3.5 billion
C) 700 million
D) 250 million

Question

Quizplus · Accepted Answer

The first animals with simple nerve nets are estimated to have evolved about 700 million years ago, during the time of the Ediacaran Period. This includes animals like sea anemones and jellyfish. The other options are not accurate as they pertain to different timeframes or events in evolution.

The First Animals with Simple Nerve Nets Probably Evolved About