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Which hormones promote the flowering in long day plants and also control sex expression in certain species?
Options
(a) ethylene
(b) gibberellin
(c) cytokinins
(d) auxin
Correct Answer:
gibberellin
Explanation:
Gibberelins are growth promoting phytohormones. Some of plant species flower only if the light period exceeds a critical length, and others flower only if this period is shorter than some critical length. Gibberelins can substitute for the long-day requirement in some species, showing an interaction with light. Gibberelins also promote the formation of male flowers on genetically female plants, e.g., Cannabis. They also replace female flowers with ,male flowers on monoecious plants of cucurbits.
Related Questions: - Korsakoff’s syndrome is related to
- Which one of the following pairs is wrongly matched?
- Which of the following is a part of endomembrane system of eukaryotic cell
- A stack of 20-50 thylakoids in a chloroplast forms
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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
- Korsakoff’s syndrome is related to
- Which one of the following pairs is wrongly matched?
- Which of the following is a part of endomembrane system of eukaryotic cell
- A stack of 20-50 thylakoids in a chloroplast forms
- Vitamin A rich transgenic plant 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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