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प्रश्न
Given below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow:
- Label the parts 1 and 2.
- Name the tropic movement shown by part 1.
- Part 1 is affected by two stimuli. Name them. Which one of the two is stronger?
- What is thigmotropism? Give one example.
- What is meant by 'Positive' and 'Negative' tropic movements in plants?
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उत्तर
- The tropic movement shown in part 1 is Hydrotropism.
- Part 1 is affected by gravity and water(moisture); water is stronger.
- The growth movement of plant parts in response to a touch stimulus is called Thigmotropism. Example: Plants such as Sweet Peas, Cuscuta and vines have tendrils that coil around other plants or other available support in response to one-sided contact or touch.
- Directional movement of a plant part towards the stimulus is called positive tropic movement, and away from the stimulus is called negative tropic movement.
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संबंधित प्रश्न
The individual flattened stacks of membranous structures inside the chloroplasts are known as ______.
Fig. demonstrates a physiological process taking place in green plants. The whole set-up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow:
- What aspect of the physiological process is being examined?
- Explain the physiological process mentioned in (a) above.
- Label the parts numbered 1 and 2 in the diagram.
- Write a well-balanced chemical equation for the physiological process explained in (b) above.
- What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.
The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow:
(i) Name the physiological process that releases the bubbles of oxygen.
(ii) Explain the physiological process as mentioned above in Q2 (a)(i).
(iii) What is the purpose of keeping a snail in test-tube ‘B’?
(iv) Why does test-tube ‘B’ have more bubbles of oxygen?
(v) Given an example of a water plant that can be used in the above process.
(vi) Write the overall chemical equation for the above process.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :
Part 1 is affected by two stimuli. Name them. Which one of the two is stronger? 
Part 1 is affected by two stimuli. Name them. Which one of the two is stronger?
Identify the false statements and rewrite them correctly by changing the first or last word only.
Immediate product of photosynthesis is glucose.
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Phloem tissue in the leaf veins.
Give some adaptations in green leaf photosynthesis.
Give technical term:
The form of energy is converted into chemical energy during photosynthesis.
Mesophyll contains chlorophyll.
Define the following term:
Photolysis of water
