Answer:
Diffusion is the movment of particles from an area of high concentration to a low concentration down a concentration gradient
Answer:
It is necessary to separate oxygenated and deoxygenated blood separate in mammals and birds to maintain their body temperature. Also, if they both are mixed, the blood will get impure and it would be difficult for the heart to supply impure blood. We also can't live with impure blood so we most probably will die.
Weathering and soil formation.
The answer is Push and Pull!!!XD
Hope this helped!!!XD
Also, can I get brainliest please?
