An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. which of the statements is true? a. the amino acid inactivates the repressor. b. the amino acid acts as a corepressor. c. inducible enzymes are produced. d. the repressor is active in the absence of the amino acid.

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Read the scenario below and answer the question that follows. hallie is reading a novel in the library when susan, her best friend, slumps down in a chair next to her. susan doesn't say anything, but hallie knows that susan is upset because she is slumping in her seat and rolling her eyes. a psychologist would explain that hallie is interpreting her friend's emotion based on a. the behavioral component of emotion b. her friend's ability to regulate emotion c. the verbal component of emotion d. the physiological component of emotion select the best answer from the choices provided a b c d

What is it called when lava when it erupts from the surface through volcanoes.