Answer:
SE we are humans so we cant beat you if your front of me iwill beat you very badly
Explanation:
Stem cells are undifferentiated cells that could develop to perform a variety of tasks. One type of stem cell is the embrionic stem cell. There are also adult stem cells. To use embrionic stem cell you need to have fertilized embrios. These can be donated to research. The use of the embrionic stem cells is controversial for this reason.
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.
There are two important regions of a lipid that provide the structure of the lipid bilayer<span>. Each lipid </span>molecule<span> contains a hydrophilic region, also called a polar head region.</span>