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प्रश्न
A potted plant is kept horizontally for a considerable time. The three positions of the parts A and B of the potted plant are shown in the following figures:
- Which figure shows the correct position taken by the parts A and B of the plant?
- What type of phenomenon is exhibited by the figure chosen in (a) above?
उत्तर
- Figure 2 shows the correct position taken by the parts A and B of a plant.
- Geotropism is the phenomenon which is exhibited in this figure. The roots of a plant show positive geotropism, whereas stems show negative geotropism.
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संबंधित प्रश्न
How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
What is the stimulus in hydrotropism?
What does a root do in response to light? What is this phenomenon known as?
What happens to the dandelion flower
- during the daytime, and
- at night?
What is this phenomenon known as?
Give one example of a plant part which is positively phototropic but negatively geotropic.
The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of :
(a) phototropism
(b) chlorotropism
(c) gravitropism
(d) chemotropism
When the leaves of a Mimosa pudica plant are touched with a finger, they fold up quickly. This is an example of ______.
A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ______.
The leaves of the 'chhui-mui' plant begin to fold up and droop in response to a stimulus. Name the stimulus and write the cause for such a rapid movement. Is there any growth involved in the movement?
Name the stimulus which causes the following movement in plant:
phototropism
