Determine why people who have had cholera or been vaccinated do not have immunity.

All of the following are major functions of proteins except 1. control of biochemical reactions. 2. support for organs or tissues. 3. protection against foreign substances. 4. transport of necessary chemicals. 5. storage of energy.

The major organs which control acids and bases in the body are: Select all that apply.

Lipids include triglycerides, phospholipids and

In depression, anxiety is triggered by what neurotransmitter? a. acetylcholine b. norepinephrine c. dopamine d. GABA

Is pectin found in animal cells?

Which statement best describes an ecosystem maintaining a state of approximate equilibrium? (1) Nutrients from decayed organisms are recycled in a forest ecosystem. (2) All the frog species in a South American rain forest become extinct.

Which of these shows the correct pathway through the heart's four chambers after it enters from the vena cava? a. left ventricle - -> right atrium - -> left ventricle - -> left atrium b.

Describe how a planet, solar system, galaxy, and the universe are related in terms of size?

What structural parts do chimpanzees and humans have in common?

What is the function of the xylem? phloem? vascular cmabium? epidermis?