The correct answer is: desertification.
Desertification is a process in which a land which was not a desert before, becomes one. This process can include drying out- through for example loss of water source, such as river diversion- and the loss of vegetation.
Answer:
1. Determine the genotypes of the parents.
2. Determine which genes are recessive and which are dominant.
3. Create a Punnett square for all the possibilities.
4. List the all possible genotypes and phenotypes for the couple's offspring.
Explanation:
Both "depends upon the binding of that substance to a specific site on the membrane protein" and "depends upon movement of proteins from one side of the membrane to the other" are correct.
The saturation effect prevents statement 2 from being true.