Lipids are important to living things for all of the following reasons, except that they are
select one:
a. used for insulation in arctic animals.
b. used for long-term energy storage in hibernating animals.
c. needed to form cell membranes.
d. chained together to form proteins.

D

Explanation:

Proteins are not made of lipids chained together but rather of amino acids chained together. Lipids are made of fatty acid chains joined to various molecules - like glycerol and phosphate that make phospholipids -  Phospholipids make up the cell membrane of most cells. Fats are deposited under the dermis of the skin for insulation and this layer is thicker in animals that live in the cold regions. During starvation, these fats are taken from their reserves and broken down to provide energy for the body.

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