Suppose you are culturing tobacco callus in a Petri dish at a 10:1 ratio of auxin to cytokinin. To promote only shoot

development you would ____.



a. increase the cytokinin ratio
b. increase the auxin ratio
c. reduce the auxin level significantly and increase the cytokinin level slightly
d. grow the tobacco in the dark
e. grow the tobacco in the light


ANSWER: a

Biology & Microbiology

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