All amino acids have a central carbon with four components attached to it. one of these components is called the r group. which of the following best describes the r group? a. the r group gives amino acid unique characteristics. b. the r group amino acids replicate. c. the r group is what stabilizes the amino acid. d. the r group is the same in all amino acids.

An adult who follows a 2000-kcal healthy u.s.-style eating pattern should consume ounce-equivalents from the protein foods group per day.

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.