Question
Biology Question on Plant Growth and Development
Differentiation of shoot is controlled by:
A
High auxin : cytokinin ratio
B
High cytokinin : auxin ratio
C
High gibberellin : auxin ratio
D
High gibberellin : cytokinin ratio
Answer
High cytokinin : auxin ratio
Explanation
Solution
A high ratio of cytokinins to auxins promotes shoot differentiation. Cytokinins and auxins are plant hormones that play essential roles in regulating various aspects of plant growth and development, including the formation and differentiation of shoots and roots. A higher concentration of cytokinins relative to auxins encourages shoot formation and growth.
So, the correct option is (B): High cytokinin : auxin ratio