The hierarchically arrayed groups indicated by colors in the figure above are called:

a. nodes. c. species.
b. clades. d. genera.


B

Biology & Microbiology

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Which of the following is nota mechanism for regulating gene expression after the mature RNA transcript is produced?

A. gene silencing by miRNAs B. inhibition of translation initiation C. blockage of the promoter by a repressor protein D. protein degradation

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Briefly explain some of the advantages and disadvantages of living in social groups

What will be an ideal response?

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Your liver produces 90% of the cholesterol found in your body. When cholesterol levels get too high, the first enzyme in the pathway of cholesterol synthesis is inhibited. This is an example of

A. positive feedback. B. negative feedback. C. equilibrium. D. denaturation. E. a coenzyme.

Biology & Microbiology

The relationship between the light-dependent and light-independent reactions in photosynthesis is that

A. the energy stored in the glucose made during the Calvin cycle is used to drive the light reactions. B. the light-dependent and light-independent reactions both take place within the membranes of bacterial cells or thylakoid membranes of chloroplasts. C. the ATP made during the light-dependent reactions is used for the growth and development of the cell and the ATP from the oxidation of glucose drives the light reactions. D. the light-independent reactions are driven by the ATP and NADPH generated from the light reactions.

Biology & Microbiology