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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: - Which of the following represent maximum number of species among global
- Illegal and unlawful development of biomaterials without payment
- The transgenetic animals are those which have
- Which of the following inhibits oxygen release in light phase?
- GIFT involves transer of
Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following represent maximum number of species among global
- Illegal and unlawful development of biomaterials without payment
- The transgenetic animals are those which have
- Which of the following inhibits oxygen release in light phase?
- GIFT involves transer of
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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