Which hormones promote the flowering in long day plants and also control sex

⇦

⇨

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:

1. In glycolysis, during oxidation electrons are removed by
2. Red book data is concerned with
3. Man is a
4. RNA contains which of the following type of sugar?
5. Dinosaurs dominated the world in which of the following geological era?

Topics: Plant Growth and Development (126)
Subject: Biology (4253)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends