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प्रश्न
Which of the following are not tropisms?
(i) growing of pollen tube in response to a sugary substance
(ii) folding up of leaves of sensitive plant in response to touch
(iii) winding of tendril around a support in response to touch
(iv) opening up of the leaves of a daisy flower in response to light
(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv)
उत्तर
(d) (ii) and (iv)
The folding up of leaves in sensitive plant as a response to touch and the opening up of leaves of a daisy flower in response to light are nastic movements.
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संबंधित प्रश्न
What is a tendril?
Tendrils wind around a support in response to ______.
The movement of sunflower in accordance with the path of the sun is due to :
(a) photonasty
(b) phototropism
(c) hydrotropism
(d) chemotropism
The root of the plant is ______.
- positively phototropic but negatively geotropic
- positively geotropic but negatively phototropic
- negatively phototropic but positively hydrotropic
- negatively hydrotropic but positively phototropic
The movement of sunflower in accordance with the path of sun is due to
Assertion (A): If the plant part moves in the direction of gravity, it is called positive geotropism.
Reason (R): Stem shows positive geotropism.
List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.
The growth movement of plant parts which occurs due to touch stimulus is called ______.
______ of sweet peas exhibit thigmotropism.
Define the following term:
Clinostat
