Answer:
Molecules which move against the concentration gradient across the cell membrane employ the mechanism of active transportation.
Explanation:
Normally, permitted molecules moves across the cell membrane of the cell by the process of diffusion and osmosis. This is used when molecules move from hypertonic region to hypotonic region (if ions) and hypotonic to hypertonic (if water). This is a passive transportation which do not require the expense of energy from the cell.
In contrast, when molecules move in or out of the cell against their concentration gradient, that is ions moving from hypotonic region to hypertonic region, they implore the expense of energy in form of adenosine triphosphate (ATP), and the involvement of the membrane carrier proteins. This is called active transport.
Answer:
The process of diffusion of solvent particles from the region of less solute Concentration to a region of High solute Concentration through semi-permeable Membrane is known as (osmosis)
D. It expands and contrasts
Hope this helps!!
Answer:
yeah because some biomes r put n2 everything
Explanation:
The contractile vacuole expels excess fluid from the cell.
