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Auxin

The rate of g...

Question

The rate of growth in roots is decreased by one of the following plant hormones. This plant hormone is :
(a) gibberellin
(b) auxin
(c) cytokinin
(d) ethene

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Solution

(b) auxin
Auxin decreases the growth rate of plant roots.

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Q. Choose the right from the following.
(i) In light, hormone auxin, helps the cells to grow longer in plants.
(ii) Plant hormone gibberellins help in growth of a stem.
(iii) Cytokinin inhibits cell division.
(iv) Abscisic acid promotes growth in plants.

Q. Most of the plant hormones promote plant growth. A plant hormone which inhibits growth is :
(a) abscisic acid
(b) ethene
(c) ascorbic acid
(d) cytokinin

Q. Read the following statements:-
(a) Auxins are group of plant hormones synthesized at the shot-tip of the plant.
(b) Gibberellins stimulate stem elongation.
(c) Cytokinins delay the ageing in leaves.
(d) Abscisic acid is a growth inhibitor.
Correct statements are _____________.

Q. Q. Which of the following pairs is/are correctly paired?

Plant Hormone	Functions
1. Auxin	Helps in the growth of plant tissue.
2. Cytokinin	Promotes cell division, delays aging of cells.
3. Ethylene	Inhibits growth and causes wilting of leaves, promoting dormancy of buds.
4. Gibberellin	This is a gaseous hormone that causes the ripening of fruits

Select the correct answer using the codes given below:

Q. What are the exact functions of the plant hormones(Auxin,Cytokinins,Gibberellins,Abscisic acid)?

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