11,700 years ago the last one ended.
The brain sends messages to the muscles through the motor nerves
A lot-
definition:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
chemical equation: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2
english equation: Carbon dioxide + water + energy from light produces glucose and oxygen.
They show not only what types of life forms were there, but the bone structure and plant structure as well. this lets us know what the organisms would’ve looked like and it allows us to compare normal day organisms to past organisms. hope this helps!