<h2>
Answer: (b) Cholesterol</h2>
Explanation:
As the name suggests, cholesterol is a sterol (a modified steroid). It is biosynthesized by animal cells.
Bibliography is essential in determining its content. I hope this helped
Relative dating best helps determine fossil age. It's where layers of sedimentary rock and fossils pile up on top of each other; the oldest fossils being in the bottom layer and the youngest in the top.
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Active transport requires energy because it moves molecules across a membrane to a region of lower to higher concentration which is often against their concentration gradient or has an obstructing factor.
