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प्रश्न
The bending of root of a plant in response to water is called ______.
विकल्प
Thigmonasty
Phototropism
Hydrotropism
Photonasty
उत्तर
The bending of root of a plant in response to water is called Hydrotropism.
APPEARS IN
संबंधित प्रश्न
Name the type of chemical substances that control the growth in plants.
Give one example of the movement of a plant part which is caused by the loss of water (or migration of water).
What is meant by ‘positive geotropism’ and ‘negative geotropism’? Give one example of each type. Draw a labelled diagram to illustrate your answer, indicating the plant part, which shows positive geotropism, and the plant part, which shows negative geotropism.
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 one way in which the above two processes are similar.
What are tropic movements? Briefly explain various types of tropic movements in plants.
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
Analogy:
Towards a stimulus: ______:: Away from the stimulus: Negative tropism.
Assertion (A): If the plant part moves in the direction of gravity, it is called positive geotropism.
Reason (R): Stem shows positive geotropism.
Write the scientific terms used to represent the following:
Growing of roots towards the gravity.
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.
