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Response of Plants to Stimuli

Amit has atte...

Question

Amit has attended a seminar on the topic "Plant Hormones". The seminar instructor discussed about the functions of a particular plant hormone X, which helps in the germination of seeds and sprouting of buds. It also helps in the elongation of stem and development of fruit. Amit got confused to identify the name of the hormone. What can be the correct answer?

A

Abscisic Acid

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B

Auxins

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C

Gibberellins

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D

Ethylene

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Solution

The correct option is C Gibberellins
Gibberellins are plant hormones which helps in the germination of seeds and sprouting of buds. It also helps in the elongation of stem and development of fruit and it also helps in the stimulation of flowering and breaking the dormancy in seeds and buds.

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Name a plant hormone that helps in ripening of fruits.

Q. Amit has attended a seminar on the topic "Plant Hormones". The seminar instructor discussed about the functions of a particular plant hormone X, which helps in the germination of seeds and sprouting of buds. It also helps in the elongation of stem and development of fruit. Amit got confused to identify the name of the hormone. What can be the correct answer?

Q. Study the following statements.
I. X hormone promotes cell elongation and helps in the increase in the length of the plant.
II. Y hormone induces flowering in mango and also promotes rapid internode/petiole elongation in deep plants and hence helping leaves or upper parts of shoot above water.
III. Z hormone inhibits the seed germination, increase the tolerance of plant to various stresses, play important role in seed development, maturation and dormancy.
Identify the correct names of hormones marked as X, Y and Z.

Q. Read the given statements and identify the plant hormones X, Y and Z.
(i) Hormone Y suppresses flowering in mango and also promotes rapid internode/petiole elongation in deep water rice plants and hence helping leaves or upper part of shoot to remain above water.
(ii) Hormone X promotes root growth and root hair formation.
(ii) Hormone Z inhibits the seed germination, increases the tolerance of plant to various stresses, play important role in seed development maturation and dormancy.

Q. 'X' is a plant hormone that helps in seed germination and 'Y' is a hormone that helps in dormancy of embryo. Identify 'X' and 'Y'.

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