Development of shoot and root in tissue culture is determined by
A. Cytokinin and auxin ratio
B. Enzymes
C. Temperature
D. Plant nutrients
Answer: Option A
Solution(By Examveda Team)
Development of shoot and root in tissue culture is determined by cytokinin and auxin ratio.The pioneering work has shown that a high auxin/cytokinin ratio induces root regeneration, whereas a low ratio promotes shoot induction.
High cytokinin-to-auxin ratios correlated with the shooty phenotype of transformed tissues propagated in vitro in the absence of added growth hormones.
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Which photosynthetic bacteria possess both PS I and PS II?
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B. Cyanobacteria
C. Purple nonsulphur bacteria
D. Green sulphur bacteria
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