Which mechanism requires energy?

A. diffusion of oxygen into a red blood cell

B. diffusion of ions through a potassium channel

C. osmosis

D. exocytosis

What happens to the electrons carried by NADH and FADH2 in the citric acid cycle during cellular respiration? A. They are used to convert glucose to pyruvate in glycolysis. B.

A part of an mRNA has the sequence GGA. Which change to the sequence would indicate a missense mutation

Compare biomes of North Africa and iceland

What class of organic compounds stores energy as fat A.) carbohydrates B.) lipids C.) proteins D.) nucleic acids

What do bacteria have in common with the cells of other living things

This type of joint enable the structure to move side to side and up and down, but with less range of motion than the Saddle joint. A. Planar B. Ball-and-Socket C. Pivot D. Condyloid

Fever: A. Slows the body's metabolic rate to conserve energy B. Is always considered dangerous C. Influences the liver to release large amounts of iron into the system D. Is the resetting of the body's temperature by chemicals. E.

To aid in the transmission of an impulse neurotransmitters are secreted by?

Select all that apply. Triticale is used in: bread cereal donuts cookies

The collision of two tectonic plates produces a volcano. What types of plates could be involved?