When biological membranes are frozen and then fractured, they tend to break along the middle of the bilayer. the best explanation for this is
(a) the integral membrane proteins are not strong enough to hold the bilayer together.
(b) water that is present in the middle of the bilayer freezes and is easily fractured.
(c) hydrophilic interactions between the opposite membrane surfaces are destroyed on freezing.
(d) the carbon-carbon bonds of the phospholipid tails are easily broken.
(e) the hydrophobic interactions that hold the membrane together are weakest at this point.

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43