Fats are the preferred energy source in many organisms because

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Fats are the preferred energy source in many organisms because they have more C-H bonds and less C-OH bonds. This makes them more energy-dense than polysaccharides, and they can be stored in adipose tissue for later use. Furthermore, fats are nonpolar, which makes them useful for insulation and waterproofing. However, they do not have essential roles as enzymes and structural elements like proteins and carbohydrates do.

Fats Are the Preferred Energy Source in Many Organisms Because