Please help, I know the answer is on chegg if you have it.
The fluidity in membranes is due to which molecule(s)?
a.) water
b.) proteins
c.) lipids
d.) Carbohydrates
e.) all of the choices are correct

Lipids

Explanation: The ratio of saturated and unsaturated fatty acids (lipids) determines the fluidity in the membrane at cold temperature.

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explanation:

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imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.