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प्रश्न
Which of the following acts as a stimulus in the process of hydrotropism?
(a) hydrocarbon
(b) hydrogen oxide
(c) hydrogen chloride
(d) hydrogen peroxide
उत्तर
(b) Hydrogen oxide
Water or hydrogen oxide acts as a stimulus in the process of hydrotropism.
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संबंधित प्रश्न
Plant roots grow downward in response to ______.
The response of leaves to the sunlight is called ______.
The root of a plant is :
(i) positively phototropic but negatively geotropic
(ii) positively geotropic but negatively phototropic
(iii) negatively phototropic but positively hydrotropic
(iv) negatively hydrotropic but positively phototropic
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (
When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk, the petals of a dandelion flower close.
state two ways in which the above two processes differ.
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
Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electrochemical means to convey information from cell to cell.
The movement of sunflower in accordance with the path of sun is due to
In the given figure (a), (b) and (c), which appears more accurate and why?
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| (a) | (b) | (c) |
Thigmonasty can be seen in ______.
Name a plant hormone responsible for bending of a shoot of a plant when it is exposed to unidirectional light. How does is promote phototropism?
