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प्रश्न
The growth of tendrils in pea plants is due to
पर्याय
effect of light
effect of gravity
rapid cell divisions in tendrillar cells that are away from the support
rapid cell divisions in tendrillar cells in contact with the support
उत्तर
rapid cell divisions in tendrillar cells that are away from the support
Explanation -
Thigmotropism is a type of directional growth movement in response to touch. Cells away from the support showed rapid cell divisions and twine around it.
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संबंधित प्रश्न
What is the scientific name of sensitive plant?
What is the stimulus in phototropism?
What is the stimulus in hydrotropism?
Give one example of chemotropism. State whether this example is of positive chemotropism or negative chemotropism.
Give one example of the movement of a plant part which is caused by the loss of water (or migration of water).
P and Q are two types of plants having weak stems which cannot stand upright on their own. The plants P and Q have organs R and S respectively which can grow towards any support which they happen to touch and wind around that support. It is observed that organ R originates from the leaves of the plant whereas organ S originates directly from the stem of the plant.
(a) What is (i) R, and (ii) S?
(b) What is the name of growth movement exhibited by the organs R and S?
(c) Name the stimulus involved in this case.
(d) State whether the behaviour of organs R and S is a tropic movement or a nastic movement.
(e) Name one plant like P and another plant like Q.
Differentiate between:
Thigmotropism and geotropism
Give an example of negative hydrotropism.
List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.
Name the phenomenon occurring in plants which are under the control of gravity, water and chemicals with one example each that shows the movement involved.
