Which vitamin is produced by the skin in response to ultraviolet light?

(A) vitamin A

(B) vitamin B

(C) vitamin C

(D) vitamin D

An organism that uses energy to produce its own food supply from inorganic compounds is called a (an)

Which of the following is NOT a true statement about ATP? A. used ATP is discarded by the cell as waste. B. ATP consists of ribose, adenine and phosphate. C. ADP forms when ATP releases energy. D.

Why do large organisms require a circulatory system

What makes sexually reproduced offspring genetically different from their parents?

Some antibiotics cure diseases by inhibiting the formation of the cell walls of specific pathogens, or disease-causing agents. On what type of pathogens can antibiotics be used? A. bacteria B. viruses C. both bacteria and viruses D.

The temporary hyperpolarization that occurs at the end of the action potential is caused by the

What is A tree that sheds its leaves in the fall exhibiting

The most sigenificant factor in determining daily caloric intake necessaty to maintain weight is

1. If you travel north from the equator, what generally happens to the intensity of ultraviolet light? a. The intensity increase b. The intensity decrease c. The intensity stay the same. 2.

What is true for an amoeba, a clock, or both.