The inner face monolayer of the human erythrocyte membrane consists predominantly of phosphatidylethanolamine and phosphatidylserine. The outerface consists predominantly of phosphatidylcholine and sphingomyelin. Although the phospholipids components of the membrane can slowly transverse the fluid bilayer, the sidedness is preserved at all times. How

the dark variety, as they are not visible on the dark tree barks

explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

sex cells are usually half's then they find another half and make a fertilize egg