The graph above shows the initial rate of transport for each substance when the cells are placed in solutions of different concentrations of A, B, and C. Based on these data, substance A is transported via



A) active transport.

B) facilitated transport.

C) passive transport.

D) simple diffusion.

E) choices A, B, and C


D) simple diffusion.

Biology & Microbiology

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An example of a mineral known as a micronutrient that may be toxic to plants is:

A. aluminum B. cadmium C. chromium D. lead E. all of the choices

Biology & Microbiology

The cecum is

a. the first part of the large intestine. b. connects to the rectum. c. between the stomach and the small intestine. d. a producer of enzymes for digestion in the small intestine. e. more than one of these

Biology & Microbiology

Which of the following has the greatest total

energy? a. cAMP b. ADP c. ATP d. glucose e. NADPH

Biology & Microbiology

B and T cells are called lymphocytes

a. true b. false

Biology & Microbiology