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प्रश्न
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
उत्तर
(d) auxin
The plant hormone auxin is responsible for negative phototropism in roots.
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संबंधित प्रश्न
What is meant by nastic movements in plants? Give one example of nastic movements in plants.
A plant's response to light is called ______.
Name the plant organ which is positively hydrotropic.
The movement of a shoot towards light is:
Differentiate between:
Phototropism and chemotropism
Higher Order Thinking Skill.
There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.
- Name the phenomenon shown by the flowers of plant A and B.
- Name one plant each which behaves like the flowers of plant A and B.
- Name the phenomenon exhibited by the leaves of plant C.
- Name the plant which behaves like the leaves of plant 'C'?
Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electrochemical means to convey information from cell to cell.
The movement of shoot towards light is
Analogy:
Towards a stimulus: ______:: Away from the stimulus: Negative tropism.
Arrange and rewrite the terms in the group in the correct order so as to be in a logical sequence, beginning with the term that is underlined.
Apical meristem, Positive phototropism, Auxins, Cell elongation.
