From what kind of molecules are steroid hormones made?
What will be an ideal response?
cholesterol
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Which of the following statements is true regarding the pituitary gland? Select all correct choices
A. it is composed of two glands B. it serves as a "control center" for the endocrine system C. it produces hormones that can target the kidneys D. it receives information from the hypothalamus E. it could be considered part of the nervous system
____ is the maintenance of a stable internal environment in the face of a changing external environment
Fill in the blank with the appropriate word.
Graph A shows that ant species richness
a. peaks at the equator. b. drops by 50 percent at 30 degrees north latitude. c. is less than 50 at 60 degrees north latitude. d. is somewhat greater at 30 degrees north latitude than at 30 degrees south latitude. e. includes all of these
All molecules required to support the body's chemical reactions are obtained from food and are called
A. organic. B. vitamins. C. nutrients. D. carbohydrates.