What controls the opening and closing of stomata?
A. leaf shape
B. vascular bundles
C. guard cells
D. mesophyll cells
E. Stomata are always open.
C
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Which of the following is most similar to lysogeny?
A) Hfr state B) F+ state C) F- state D) F' state
Which of the following might lead to the generation of several incorrect PCR products?
A) An annealing temperature that is too low B) An annealing temperature that is too high C) Performing 30 cycles of PCR D) Using the correct primers E) Including an extension step
Tautomeric shifts ________
A) are known to cause insertion or deletion mutations B) allow pyrimidines to bind to pyrimidines C) can cause missense mutations due to mispairings D) are likely to cause frameshifts E) allow purines to bind to purines
Bacteria can act as probiotic agents, such as species of ________ added to yogurt, to help impart health effects to the intestinal tract.
What will be an ideal response?