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प्रश्न
What is chlorophyll?
उत्तर
Green pigments present in leaves.
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संबंधित प्रश्न
Give the scientific terms used to represent the Winding of tendril around a support.
What is meant by nastic movements in plants? Give one example of nastic movements in plants.
Which of the following is a growth movement and which is not?
- Folding up of leaves of sensitive plant on touching with hand.
- Folding up of petals of dandelion flower when light fades.
Name the plant organ which is positively geotropic
Define geotropism.
What is meant by ‘positive geotropism’ and ‘negative geotropism’? Give one example of each type. Draw a labelled diagram to illustrate your answer, indicating the plant part, which shows positive geotropism, and the plant part, which shows negative geotropism.
While conducting experiments to study the effect of various stimuli on the plants, it was observed that the roots of a plant X grow and bend towards two stimuli A and B but bend away from a third stimulus C. The stem of the plant X, however, bends away from stimuli A and B but bends towards the stimulus C. The stimulus B is known to act on the roots due to too much weight of the earth. Keeping these points in mind, answer the following question:
- What could stimulus A be?
- Name the stimulus B.
- What could stimulus C be?
- The branches of a fallen tree in a forest grow straight up in response to two stimuli. What could be these two stimuli out of A, B and C? Also name these two stimuli.
With the help of an experiment, prove that roots are more positively hydrotropic than geotropic.
Give the scientific term for the following:
Growth-dependent movement in plants.
Write the scientific terms used to represent.
Leaves fold up and droop in touch-me-not plant Mimosa pudica
