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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
Related Questions: - The trisomy for 21st chromosome is called
- In land plants, the guard cells differ from other epidermal cells in having :
- In which group of organisms the cell walls form two thin overlapping shells
- Medical Termination of Pregnancy (MTP) is considered safe up to how many week
- Advantage of cleistogamy is:
Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The trisomy for 21st chromosome is called
- In land plants, the guard cells differ from other epidermal cells in having :
- In which group of organisms the cell walls form two thin overlapping shells
- Medical Termination of Pregnancy (MTP) is considered safe up to how many week
- Advantage of cleistogamy is:
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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