Which of the following choices best describes dopamine?

A substance that is naturally found in the brain.

An illegal drug that can cause great damage.

A receptor molecule that is found on neurons.

A protein that stimulates neurons to grow.

All living things contain organic compounds. True False

Red-tailed hawks prey on prairie dogs. If another species of hawk that eats prairie dogs migrates into the area, what is most likely to happen to the prairie dog population? A. It will increase exponentially. B. It will increase slightly. C.

The process by which water is "pulled" up through the xylem columns of plants as it evaporates out of the leaves is called

Where is the small intestine in a frog?

Chromosomes other than sex chromosomes are autosomes. a. True b. False

Which field of anthropology studies human characteristics including hair color, height, skin color and brain size?

Which term best describes a protein that speeds up chemical reactions in living things

How many bases are need to specify three amino acids

Nutritionists and doctors do not recommend energy restrictions below. Calories for women and. Calories for men.

Which of the following is an example of a two-shelled mollusk? a. snail. b. oyster. c. gastropod. d. radula.