4. Enzymes are (choose one) a. Lipids c. Proteins b. Carbohydrates d. Nucleic acids

The jugular vein is located on an animal's A. neck. B. foreleg. C. tail. D. hindleg.

Why are rills and gullies more likely to form in steep mountains than in flat valleys? A) water moves more slowly down steep gradients, which allows the formation of channels.

Explain why scientists are concerned about the release of the methane stored in Arctic ice.

A condition that occurs when the tissue fluid pressure has increased

What structure is properly matched with their reproductive role of the reproductive system?

Which function of the nephron includes the movement of fluid from the blood into bowman's capsule?

Which one of the following is true for a theory? A) Explanation supported by experiments B) Widely accepted as true C) Supported by repeatable results D) All of the choices

Which of the following is the largest contributor to the salt ions in the ocean? sodium chloride sulfates calcium

Your body moves food thourgh the digestive tract by using a. smooth muscle b. cardiac muscle c. extensor muscle d. Flexor muscle

A group of organs that work together to perform a major function is called a (n)