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Growth Independent Movements

Auxin : Growt...

Question

Auxin : Growth of Plants :: _____ : Inhibits growth of plants.

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Solution

Auxin is responsible for the growth of the plants. The hormone abscisic acid is responsible for the inhibition of growth in plants and causes the abscission of leaf and other ageing symptoms.

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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 helps in growth of a stem.
iii. Cytokinins inhibits cell division.
iv. Abscisic acid promote growth in plants.

Q. Assertion: Phytohormones are the plant compounds that can promote and inhibit the plant growth.
Reason: There are some phytohormones like auxin, cytokinins which play a role in plant growth and some phytohormones like abscisic acid which inhibit the plant growth.

Assertion (A): Decapitation of shoot tip in plants induces the growth of their lateral buds

Reason (R): Accumulation of auxins in lateral buds causes inhibition of their growth

Q. Low concentration of auxin inhibits growth in

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

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