What is the climax community in ecological succession? a. The very first organisms to colonize a new habitat. b. A group of organisms competing for the same resources. c. A relatively stable community with a variety of species. d. A community that is undergoing a disturbance.

Name the body systems helped by each of the following. 1. Not smoking 2. Caring for teeth 3. Drinking liquids

Rhudopsinol is a new drug designed to treat sleepwalking, and has a half-life of two hours. It is produced in 500 mg tablets. If \( 40 \% \) of the orally ingested drug is absorbed into the bloodstream, which of the following functions gives the amount of Rhudopsinol in the bloodstream, in milligrams, \( t \) hours after the ingestion of a single tablet? A) \( f(t)=(400)(0.5)^{2+t} \) (B) \( f(t)=(0.4)(500)(0.5)^{\frac{2}{2}} \)

aswer True or False. 1. The nervous system carries blood. 2. The basic parts of the nervous system are neurons. 3. Bundles of neurons are called electric sparks. 4. Sense organs get information from the environment. 5. Sensory nerves cause muscles to move.

D. Answer the question. What does the nervous system do?

4. Carbohydrates are found in (a) breads and pasta. (b) water. (c) vitamins. 5. Urine moves from the kidneys to (a) the rectum. (b) the large intestine. (c) the bladder. in 6. Keep your lungs healthy by (a) smoking. (b) exercising. (c) dieting.