Answer:
B Requires building dams that can harm ecosystems
Explanation:
Having filtered out small essential molecules from the blood - the kidneys must reabsorb the molecules which are needed, while allowing those molecules which are not needed to pass out in the urine. Therefore, the kidneys selectively reabsorb only those molecules which the body needs back in the bloodstream.
Answer:
Biosphere
Explanation:
It is not the atmosphere, because the atmosphere is made up of air. It is the biosphere because it is a plant.
Diffusion is the random movement of molecules or particles from a region of high concentration to a region of low concentration bringing a natural flow in the system. Diffusion ensures that there is a state of equilibrium in the number of molecules in the system.
The normal, or emmetropic, eye accommodates properly.
