Do you mean ion pumps in the membrane of cell?
If so, then ion pumps maintain an electrochemical gradient across the membrane.
Answer: Well, populations never evolved than one human might have gone extinct due to many different viruses and sicknesses but other animals might not be extinct. If populations never grew more then that would be because we could not overpower dome viruses. If we never. If we never evolved animals like a Carrier pigeon would not be dead or extinct today.
The use of reforestation to control erosion in the mountains.
Answer:
The ocean.
Explanation:
It starts with the ocean and then there is evaporation condensation and precipitation and then runoff.
Traditionally used as a thickening agent in lotion, this vegetable derived waxy substance is also used as a hardening agent in soaps (at a .5% of your oils as a usage rate). Stearic acid is also used as a hardening agent in candles, vegetable or paraffin based.
