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Hypothetical plant hormones are
Options
(a) florigen
(b) vernalin
(c) florigen and vernalin
(d) auxin
Correct Answer:
florigen and vernalin
Explanation:
The commonly recognized classes of plant hormones are the auxins, gibberelins, cytokinins, abscisic acid, and ethylene, Circumstantial evidence suggest that flower initiation is controlled by hypothetical hormones called florigens, but these substances remain to be identified. Florigen means flower forming hormones. A German plant physiologist Georg Melchers had proposed the existence of a stimulus of vernalization and he termed it as vernalin. Vernalin has not been isolated so far so it still remains to be
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Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An artificial pacemaker is implanted subcutaneously and connected to the heart
- Which one gives the most valid and recent explanation for stomatal movements ?
- Photorespiration could easily be detected in
- Minerals known to be required in large amounts for plant growth include :
- A change in the amount of yolk and its distribution in the egg will affect
Topics: Plant Growth and Development (126)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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