Phospholipids make up biological membranes .a. have hydrophobic tails that face outward and are exposed to water. b. None of the choices are correct. c. have hydrophobic heads that face the center of the membrane and are shielded from water. d. remain fluid because they are tightly packed against one another. e. often have "kinks" in their tails caused by the presence of a single rather than a double bond between carbons.

Phospholipids make up biological membranes None of the choices are correct.

Explanation:

Phospholipids make up biological membranes but not having the following  hydrophobic tails that face outward and are exposed to water nor having hydrophobic heads that faces the center of the membrane and are shielded from water nor remaining fluid because they are tightly packed against one another often have "kinks" in their tails caused by the presence of a single rather than a double bond between carbons

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

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