Animals with the first rudimentary brains probably evolved about _________ years ago.
A) 4.5 billion
B) 3.5 billion
C) 700 million
D) 250 million

Name: Animals with the first rudimentary brains probably evolved about _________ years ago. A) 4.5 billion B) 3.5 billion C) 700 million D) 250 million
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The Answer of  Animals with the first rudimentary brains probably evolved about _________ years ago.
A) 4.5 billion
B) 3.5 billion
C) 700 million
D) 250 million

Animals with the First Rudimentary Brains Probably Evolved About _________