In plants, the red light favours:
Correct answer: C. Elongation of cells
- A. Enhancement of cell differentiation
- B. Maturation of the cells
- C. Elongation of cells
- D. Enhancement of cell division
Explanation
Explanation:Red light favours elongation of cells and blue light enhances cell division but retards cell enlargement.When red light can influence the differentiation of certain cell types in plants, it is not the primary effect of red light.Red light is not known to have a significant effect on the maturation of cells in plants.Red light is also not known to have a direct effect on cell division in plants, although it can indirectly influence cell division by promoting plant growth and providing the necessary conditions for cell division to occur.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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About Plant Growth Regulators
Plant growth regulators are chemical messengers that control growth, development and responses to the environment. The topic covers auxins, gibberellins, cytokinins, abscisic acid and ethylene, including cell elongation, apical dominance, tropisms, seed germination, dormancy, fruit ripening and leaf fall, with growth promoters distinguished from inhibitors.
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