Lipids include:
A. fats and water
B. Oils and carbohydrates
C. Waxes and sterols

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating

How are isotopes of the same chemical element alike? how are they different?