Examlex
A biogeochemical cycle involves only the abiotic components of an ecosystem,and describes how chemicals circulate through those components.
Cholesterol
A waxy, fat-like substance present in all cells of the body, needed to make vitamin D, hormones, and substances that help digest foods.
Lipid
A group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins, and others, serving as key components of cell membranes and energy storage.
Steroid
Large family of lipids, including some reproductive hormones, vitamins, and cholesterol.
Phospholipids
A class of lipids that are a major component of all cell membranes, known for their bilayer formation that makes up the plasma membrane's structure.
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