Biology
List five plant growth hormones and mention one important role of each.
Answer
- Auxins — Auxins promote the growth of stem, roots and fruits by cell elongation.
- Gibberellins — Gibberellins promote the growth of internodes by cell elongation.
- Cytokinins — Cytokinins stimulate cell division.
- Ethylene — Ethylene helps in ripening of fruits.
- Abscisic acid — Abscisic acid induces dormancy of buds and seeds.
Related Questions
The box given below contains twelve words. Out of these, ten can be arranged in five suitable matching pairs. Make these five pairs in the form of a table.
Auxin, Abscisic acid, Fruit ripening, Cytokinins, Closure of stomata, Parthenocarpy, Ethylene, Gibberellins, Tropism, Stem elongation, Cuscuta, Cell division Define the following terms:
(a) Phytohormones
(b) Tropism
(c) Clinostat
(d) Apical dominance
(e) Parthenocarpy
(f) Abscission
(g) Heliotropism
Differentiate between Thigmotropism and geotropism
Differentiate between Positive and negative tropism