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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.
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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
- Most fossils have been found in
- Difference between prokaryote and eukaryote lies in
- Colour blindness is due to defect in
- Decomposers are organisms that
- When the margins of sepals or petals overlaps one another without any particular
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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