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Animal Hormones

Which plant h...

Question

Which plant hormone makes a stem (or shoot) bend towards light?

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Solution

Auxin is a plant hormone which makes a stem (or shoot) bend towards light sources.

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Which plant hormone bend towards the light?

Q. A plant always bends towards light. This is due to the action of a hormone called _____ and its found at _______.

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. Bending of stem/coleoptile towards light or shoot of potted plant placed near a window is due to

Q. Name the plant hormones which are responsible for the following effects :
(a) falling of leaves
(b) opening of stomata
(c) bending of stem towards light
(d) closing of stomata

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