Answer:
unicellular life first
Explanation:
it arose billions of years ago while multicellular life forms around at least 600 million years ago
D is the right answer
But then again it is actually wrong... Either way D is the answer
Answer:
come on yu can do thi you just need to try a little harder and stop asking us to answer all your questions just try.
Explanation:
Answer:
b. ventricles
The right and left ventricles