The skin of a cell
molecule flow from high to low
glucose facilitation
ion channels
The answer is C and D.
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What happens to the population density and competition if the birth rate decreases?
The birth rate would increase is the population density competition increased.
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What is teligram i would like to help?
Answer:
A) they help transport some substances through the membrane.
Explanation:
The membrane proteins that span the bilayer of phospholipids help in the transport of polar, large and charged substances across the membrane. The nonpolar core of the membrane does not allow these charged and polar substances to pass through. Proteins serving as channels form pores to allow movement of the specific substances.
On the other hand, carrier transport proteins of the membrane bind to the substances present at one side of the membrane and deliver them to the opposite side.
