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प्रश्न
Define thigmotropism. Give one example of thigmotropism.
उत्तर
The directional movement of plant parts in response to touch is known as thigmotropism. The movement of tendrils of climbing plants towards the things they happen to touch is an example of thigmotropism.
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संबंधित प्रश्न
Plant parts show two types of movements, one dependent on growth and other independent of growth Give one example which depends on growth
Give one example of a plant part which is positively hydrotropic as well as positively geotropic.
The response of leaves to the sunlight is called ______.
One of the following plant hormones is responsible for the phenomenon of phototropism in plants. This is :
(a) gibberellin
(b) eltroxin
(c) cytokinin
(d) auxin
A growing seedling is kept in a dark room. A burning candle is placed near it for a few days. The top part of seedling bends towards the burning candle. This is an example of :
(a) chemotropism
(b) hydrotropism
(c) phototropism
(d) geotropism
State whether true or false. If false, correct the statement.
Shoot is positively phototropic and negatively geotropic.
Write the scientific terms used to represent the following:
Growing of roots towards the gravity.
Write the scientific terms used to represent the following:
Bending of roots towards the water.
Name the stimulus which causes the following movement in plant:
phototropism
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).
