Active transport is the moving of molecules across the membrane of the cell against the concentration gradient with the use of ATP.
Low to high concentration. Concentration gradient is the diffusion (movement of molecules from regions of low concentration) from high to low with the gradient. Active transport is from low to high, against the gradient.
Answer: Mutations can be good or bad.
Explanation:
Well the excretory system produces waste.
Crease, could you mark brainliest? :)
<span>By filtering the air so that the lungs so the lungs don't get infected</span>
