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प्रश्न
Name the plant part which bends in the direction of gravity but away from light.
उत्तर
Roots bend in the direction of gravity but away from the light.
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संबंधित प्रश्न
Design an experiment to demonstrate hydrotropism.
Name the plant organ which is negatively geotropic.
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.
The movement of a plant part in response to the force of attraction exerted by the earth is called :
(a) hydrotropism
(b) geotropism
(c) chemotropism
(d) phototropism
One of the following is not caused by the growth related movement of the concerned plant part. This is:
The bending of the root of a plant away from a source of light is caused by a plant hormone called :
(a) cytokinin
(b) gibberellin
(c) abscisic acid
(d) auxin
Differentiate between:
Phototropism and chemotropism
Name the stimulus which causes the following movements in plants.
phototropism, thigmotropism, hydrotropism and geotropism
Define the following term:
Tropism
The diagram given alongside shows a type of tropism. Study the same and answer the questions that follow:
- Name and define the type of tropism shown in the diagram.
- Label the guidelines (1) to (4).
- Name two effective stimulants that help in the growth of part (2).
- Name two groups of plants where part (2) grows towards gametophyte with the help of the stimulants mentioned in (c).
