As the guard cells ________, the stomata become ________

A) swell; open
B) shrink; open
C) swell; closed
D) shrink; larger


A

Biology & Microbiology

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Which of the following is LEAST commonly associated with endospore-forming bacteria?

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In bacteria, restriction enzymes function to ____

a. identify sequences of interest in a DNA library b. produce human proteins c. provide antibiotic resistance d. chop up invading viral DNA e. make the cells vulnerable to viruses

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The X-inactivation center gene is

A) SRY. B) XIC. C) Xce. D) MATa. E) Xist.

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How many stop codons are there in the genetic code?

A. five B. one C. four D. two E. three

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