C the earth because that is the only planet around so he thought that the sun and everything else rotated around us.
Answer:In this simulation, you are a bird hunting for moths.
Explanation:
In this simulation, you are a bird hunting for moths. You can hunt in an area with light-colored trees or dark-colored trees.
Answer:
the answer is option b hope you understand
Answer:
Active uptake (which I think you mean active transport) is important when the concentration gradient is against that of a certain substance, so it doesn't cross the membrane through diffusion or passive transport. It is sometimes necessary if a substance needs to move across a membrane but can't do so due to electrical charge or that there is a substance on the other side of the membrane preventing diffusion.
Explanation:
