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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: - Accumulation of which of the following in muscle causes fatigue
- Graffian follicles contain
- A small aquatic herb in which a portion of leaf forms a tiny sac or bladder
- What is correct to say about the hormone action in humans
- Water movement between cells is due to
Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Accumulation of which of the following in muscle causes fatigue
- Graffian follicles contain
- A small aquatic herb in which a portion of leaf forms a tiny sac or bladder
- What is correct to say about the hormone action in humans
- Water movement between cells is due to
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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