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Question
Ali has some pea plants in his garden which need a support to grow as seen in the picture given below:
- Name the phenomenon depicted by the shoot in the given figure.
- Define the above phenomenon.
- Write the name of the part marked X.
Solution
- Thigmotropism. Tendrils coiling towards objects they come into contact with show thigmotropism.
- In plants, thigmotropism is a tropic movement in response to an external stimulus, sometimes referred to as a contact stimulus.
- The part marked X is Leaf Tendril.
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RELATED QUESTIONS
What is the stimulus in chemotropism?
What does a Mimosa pudica plant do in response to touch? What is this phenomenon known as?
Give one example of a plant part which is positively phototropic but negatively geotropic.
A plant's response to gravity is called ______.
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
Which of the following acts as a stimulus in the process of hydrotropism?
(a) hydrocarbon
(b) hydrogen oxide
(c) hydrogen chloride
(d) hydrogen peroxide
State whether true or false. If false, correct the statement.
The response of a part of plant to the chemical stimulus is called phototropism.
The stimulus in the process of thigmotropism is:
In the given figure (a), (b) and (c), which appears more accurate and why?
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| (a) | (b) | (c) |
Name the stimulus which causes the following movement in plant:
Hydrotropism
