The plant hormones (or phytohormones) regulate many functions in plants.
The various functions in plants which are regulated by the plant hormones (or phytohormones) are :
1. Germination of seeds (or Breaking the dormancy of seeds),
2. Growth of root, stem and leaves,
3. Movement of stomata (or stomatal movement) in leaves,
4. Flowering of plants,
5. Ripening of fruits, and
6. Phototropism, geotropism, chemotropism, hydrotropism, thigmotropism and nastic movements. Now, answer the following questions:
1. Which of the following is a plant hormone ?
(i) Insulin
(ii) Thyroxine
(iii) Oestrogen
(iv) Cytokinin
2. Does auxins promotes the growth of a tendril around a support?
(i) YES
(ii) NO
3. Is the following a function of plant hormones: Flowering of plants
(i) YES
(ii) NO
4. Is the following a function of plant hormones: Growth of root
(i) YES
(ii) NO
5. Is the following a function of plant hormones: Converting carbon dioxide to oxygen.
(i) YES
(ii) NO
