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प्रश्न
What are the different types of tropisms? Define each type of tropism. Write the name of stimulus in each case
उत्तर
The different types of tropisms are:
(i) Phototropism: The movement of plant parts in response to light is known as phototropism. The stimulus is light.
(ii) Geotropism: The movement of plant parts in response to gravity is known as geotropism. The stimulus is gravity.
(iii) Hydrotropism: The movement of plant parts in response to water is known as hydrotropism. The stimulus is water.
(iv) Chemotropism: The movement of plant parts in response to chemicals is known as chemotropism. The stimulus is chemicals.
(v) Thigmotropism: The movement of plant parts in response to touch is known as thigmotropism. The stimulus is touch.
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संबंधित प्रश्न
Plant shoot grows upward in response to ______.
What is meant by positive tropism and negative tropism? Explain with examples.
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
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
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
Plants take in carbondioxide for photosynthesis but need ______ for their living.
Heliotropism is a kind of ______.
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?
The height of a plant is regulated by ______.
______ of sweet peas exhibit thigmotropism.
