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Abscisic Acid

During normal...

Question

During normal growth of a plant the stem tip always bends towards light because of the

A

Accumilation Of auxins on illuminated side

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B

Movement of a hormone towards the shaded side

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C

Fact that the light attracts the stem tip

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D

Fact that growth requires light

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Solution

The correct option is B
Movement of a hormone towards the shaded side

Accumulation of auxins on shaded side

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Similar questions

Q. A student takes a potted plant growing in a transparent glass jar. This potted plant having straight stem and straight root is kept near the window in a dark room so that sunlight falls on it from the right side (through the window). After some days, it is found that the stem of plant bends towards the right side (from where the light is coming) but the root bends to the left side, away from the light.
(a) What term is used to indicate:
(i) response of plant to sunlight?
(ii) bending of stem of plant towards sunlight?
(iii) bending of root of plant away from sunlight?
(b) Name the plant hormone which makes the plant respond to sunlight.

Q. Choose the correct answer from the alternatives given.
In unidirectional light auxin moves to the shady side of a stem and then the stem bends toward the light. Which step in this sequence represents transduction?

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Q. The stem of a plant bends towards light. This property is known as ___________

Q. (a) How is movement of leaves of touch-me-not plant and the movement of growth in stem towards light differ?
(b) Give a suitable example of chemotropism?

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