Aprimary function of cholesterol in the plasma membranes of some animals is to
a) make the membrane more rigid, allowing it to resist pressure from outside the cell.
b) facilitate the removal of hydrogen atoms from saturated phospholipids.
c) facilitate cell-cell interactions by binding to receptors on neighboring cells.
d) enable the membrane to stay fluid more easily when the temperature drops.

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❖ A primary function of cholesterol in the plasma membrane of some animals is to D) enable the membrane to stay fluid more easily when the temperature drops.

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

if you know your abc's you should be able to get your answer or just use google