This gas is found in the stratosphere but not in the troposphere. What is it?

A) ozone.

B) oxygen.

C) nitrogen.

D) carbon dioxide.

Which of the following is true of modern cell theory

If the strips of clay represent the Earth's lithosphere, what do you think is formed in the lithosphere?

Which of these is a prokaryote? a. fungi b. protist c. plant d. bacteria

All organisms on earth require a source of energy to live. ATP is the fuel that powers all the activities of cells on earth. Which statement Best describes how ferns, people and flatworms obtain energy?

Cell drinking; cell eating. Both are modeled here and are examples of A) osmosis. B) diffusion. C) endocytosis. Eliminate D) facilitated transport.

Which process changes sedimentary rocks into igneous

Unlike minerals such as iron and calcium, protein is a macronutrient in the human diet. Why is protein a macronutrient?

Energy drinks have become increasingly popular. Somebody's trying to contain large amounts of caffeine which is known to increase heart rate in most individuals. This effect on the heart rate can be Dangerous because it can lead to

Which statement describes an activity of a decomposer? A) a mushroom digests and absorbs nutrients from organic matter?

How does science works