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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
- Hormones released during stress condition is
- Which one of the following expanded forms of the following acronyms is correct?
- Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous
- Homeostasis is
- Which of the following is a recent application of genetic engineering in diagnostic
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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