Organic macromolecules called lipids are insoluble in water, are often found in biological membranes and other waterproof coverings, and have the ability to store energy for extended periods of time.

The key words here are insoluble in water and waterproof. Substances that aren't soluble in water are typically not polar, like hydrocarbons. Lipids are made entirely from long chains of carbon and hydrogen, sometimes with a polar phosphorous at one head. That is why the answer must be lipids.

Answered by dlpeckham | 2024-06-10

The organic macromolecules described in the question are lipids. They are found in biological membranes and waterproof coverings and are an important source of stored energy in living organisms. ;

Answered by RachelMeghanMarkle | 2024-06-18

Lipids are hydrophobic macromolecules made primarily of carbon and hydrogen, essential for energy storage, insulation, and forming cellular membranes. They include types such as fats, phospholipids, and steroids, each serving vital functions in biological systems. Their nonpolar nature ensures their role in preventing water loss and maintaining cellular integrity.
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Answered by dlpeckham | 2024-12-26