The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
Answer:
It allows information to go from one neuron to another through neurotransmitters.
Answer:
A
Explanation:
All systems work together to do-- anything really. Especially to move-
Answer:
I think when the earth was created it took a time. Then dinosaurs came. Then tey extinct because falling of asteroid on Earth.Then after a period of time the sea,mountains and other natural things were made again.
