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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: - Endosperm is consumed by developing embryo in the seed of
- Muscles get fatigue due to accumulation of
- Grafted kidney may be rejected in a patient due to :
- Which of the following non angiospermic plants have vessels
- Hexose and pentoses are the most common
Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Endosperm is consumed by developing embryo in the seed of
- Muscles get fatigue due to accumulation of
- Grafted kidney may be rejected in a patient due to :
- Which of the following non angiospermic plants have vessels
- Hexose and pentoses are the most common
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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