In the diagram of a root tip shown above, the item labeled "5" is the

a. quiescent center.
b. zone of cell division.
c. zone of elongation.
d. root cap.
e. zone of maturation.


C

Biology & Microbiology

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According to Stern's experiment described in Figure 6.17, which one of the following enzymes was shown to form an intermediate complex with its substrate(s)?

A. -galactosidase B. pepsin C. DNA polymerase D. lysozyme E. catalase

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The urinary tract above the bladder usually shows

A. Escherichia coli. B. Staphylococcus aureus. C. Proteus vulgaris. D. no bacteria. E. Escherichia coli AND Staphylococcus aureus.

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What compound served to contain interacting organic molecules within a protocell?

a. RNA b. DNA c. lipids d. single amino acids e. amino acid polymers

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Reabsorption of water and essential solutes

occurs in the region labeled

a. 1. b. 2. c. 3. d. 4. e. as none of these.

Biology & Microbiology