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प्रश्न
Fill in the following blank :
...... is the hormone that causes phototropism in plants
उत्तर
Auxin is the hormone that causes phototropism in plants.
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संबंधित प्रश्न
What is the stimulus in chemotropism?
The plant part which exhibits negative geotropism is :
(a) root
(b) stem
(c) branch
(d) leaves
When the leaves of a Mimosa pudica plant are touched with a finger, they fold up quickly. This is an example of ______.
Differentiate phototropism from photonasty.
A student accidentally places her hand on the flame of the candle and quickly pulls her hand away. The flame represents:
The growth of tendrils in pea plants is due to
When the leaves of a sensitive plant are touched with a finger, they fold up, and when the light fades at dusk the petals of a sunflower. These two plants show ______ and ______ movements.
List two differences between the movement of leaves of a sensitive plant and the movement of a shoot towards light.
Name the following:
The tropic movement of plant parts in response to chemicals.
Given below are the figures showing some kinds of tropic movements in plants. Study the same and answer the following questions:
- Which one of these figures is correct? Give reason in support of your answer.
- Name the kinds of movements shown by the root system and shoot system. Define each.
- What are the two stimuli which affect root system and shoot system positively? Name them.
- Which of the following stimuli affects the growth of the root strongly?
- Gravity
- Water
- Draw a neat and labelled diagram of the longitudinal section of a pistil showing chemotropism in an angiospermic plant.
