By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
Answer:
(a) energy source, either sunlight or chemicals
Explanation:
Answer:
In the electron transport chain, when the protons move down their concentration gradient, the electrons are transferred from one molecule to the other and energy is released.
Explanation:
During the rear stage of cell respiration or oxidative phosphorylation two processes are involved. Among which one is the electron transport proton gradient chain, in which protons are transferred from one to the other molecule.
In this process electron also releases energy to make an electrochemical gradient. In this chain oxygen accepts protons and chooses electron to produce water.
Answer:
<em>The correct option is A) 6 years</em>
Explanation:
In ecological studies, carrying capacity can be described as the maximum number of organisms of a species that a particular area can hold.
Each area has certain amounts of resources to carry a specific number of individuals of a species. Beyond this capacity, resources begin to deplete and the organisms start fighting for the resources. As a result, their population declines.
The following graph shows that the forest habitat reached the carrying capacity for rats in the year 6 after which its population began to decline, instead of increasing.
