Not entirely sure of the answer you are looking for, but when a molecule is moved against a concentration gradient, there is energy involved.
For example, the proton pump in the body (H+ ATPase) requires an input of energy in the form of ATP in order to provide the H+ concentration gradient that is needed.
Answer:
All pieces of land on Earth were once joined together.
Earth's surface is covered with continental plates.
All the continents are moving at a slow pace.
Explanation:
According to the Wegener, at first all continents are fuse together make a supercontinent which later broke apart into seven large masses of land. All the continents are moving away from each other at very slow rate. The surface of earth is covered with continental plates that is responsible for the breaking and movement of continents from each other.
Answer:
A they have increased dramatically
Explanation:
As the time progresses it was relatively stable until about 1800, and then the atmospheric CO2 increased dramatically