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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
- Chronic exposure to arsenic causes
- Which of the following chambers of ruminant stomach contains the gastric juice
- Which of the following yield ATP during contraction of muscles
- Action and absorption spectrum was first represented by
- The pathogen Microsporum responsible for ringworm disease in humans belong
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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