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प्रश्न
What does a stem (or shoot) do in response to gravity? What is this phenomenon known as?
उत्तर
Stem always grows up and away from the pull of gravity. This phenomenon is known as negative geotropism.
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संबंधित प्रश्न
Design an experiment to demonstrate hydrotropism.
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Name five stimuli which act on plants. Name the type of tropism produced by each one of these stimuli.
What is the difference between thigmotropism and thigmonasty? Name one plant which exhibits thigmotropism and one plant which exhibits thigmonasty. What behaviour (or responses) of these plants make you think that they exhibit thigmotropism and thigmonasty respectively?
The bending of the stem of a plant towards a source of light is caused by the action of a phytohormone known as :
(a) abscisic acid
(b) auxin
(c) gibberellins
(d) cytokinin
The root of the plant is ______.
- positively phototropic but negatively geotropic
- positively geotropic but negatively phototropic
- negatively phototropic but positively hydrotropic
- negatively hydrotropic but positively phototropic
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Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electrochemical means to convey information from cell to cell.
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