Which organ system delivers nutrients and

oxygen to the cells?



a. respiratory
b. urinary
c. digestive
d. lymphatic
e. circulatory


E

Biology & Microbiology

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The lactose repressor

A. is transcribed with the structural lac genes. B. is inactivated by binding lactose. C. requires lactose for its transcription. D. is activated by binding lactose.

Biology & Microbiology

Consider how many of each type of atom is present in a single molecule of glucose. Which of the following pairings is incorrect?

a. H = 12 b. O = 12 c. C = 6

Biology & Microbiology

ATP is formed when ____ the thylakoid

compartment.

a. hydrogen ions enter b. hydrogen ions leave c. electrons leave d. electrons enter e. water is split in

Biology & Microbiology

In attempting to construct a universal phylogeny, researchers analyzed several different gene sets. The results of this analysis are not congruent (see accompanying figure)

The most likely explanation for this, as proposed by Carl Woese and others, is ________ [three words] in early populations, which would account for these discrepancies. Fill in the blank(s) with correct word

Biology & Microbiology