Answer:
According to research ,
<h3> cellular membranes (e.g plasma membranes internal membranes) :</h3>
are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains.
Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.
Explanation:
Genotype frequency: RR is dominant, Rr is heterozygous and rr is recessive.
R^2+2Rr+r^2 = 1
R = 0.85
R^2= 0.85*0.85 = 0.7225