Which of the following is not a known role for cholesterol? group of answer choices
a. it is used to make bile it is used as a component of plasma membranes
b. it is used to make testosterone
c. it is used to make saturated fat
d. it is used to make all steroid hormones it regulate fluidity in plasma membranes

The answer is c. it is used to make saturated fat.

Explanation:

The cholesterol is a lipid which belongs to the chemical group of steroids. It is a precursor of sexual hormones such as estrogen, progesterone and testosterone, often called steroid hormones. The bile- used in digestion- it is  made from cholesterol too. Cholesterol is also present in animal cellular membranes, in which its function is the regulation of fluidity of the plasmatic membrane.

It is not used to make saturated fat, because they are not stereroid lipids. Saturated fat is composed of glycerol and fatty acids.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.