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प्रश्न
Give reason for the following:
If you uproot a plant from the soil, its leaves soon wilt.
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उत्तर
If a plant is uprooted, the leaves continue to lose water through transpiration, but there is no more water absorbed by the roots. This does not allow compensation for the loss of water by transpiration; hence, the leaves of the uprooted plant will wilt soon.
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संबंधित प्रश्न
The process by which root hairs absorb water from the soil.
Correct the following statement by changing the underlined word.
Xylem transports starch from the leaves to all parts of the plant body.
Concentration of mineral nutrient elements is higher inside the root hairs than in the surrounding soil. How do roots take them in from the soil?
What part is played by the following in the uptake of water into the root hair?
The cell wall
The diagram given below represents a plant cell after being placed in a strong sugar solution. Guidelines 1 to 5 indicate the following:
1. Strong sugar solution
2. Cell wall
3. Protoplasm
4. Large vacuole
5. Nucleus
Study the diagram and answer the questions that follow:
(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
(iii) If the cell had been placed in distilled water instead of strong sugar solution which feature would not have been present?
(iv) If the cell in the diagram possessed chloroplasts where would these be present?
(v) Name any one feature of this plant cell which is not present in animal cells.
The figure shows a diagrammatic representation of the movement of certain substances inside the stem of a certain plant. Write five sentences on whatever you can explain about the processes or the arrangement of structures indicated in the diagram.
Note: - Each sentence must include one or more of the following four words, and each word can be used several times. Xylem, phloem, roots, leaves.
A few RBC’s were kept in three test tubes containing isotonic, hypotonic and hypertonic solutions. What will be the expected observations after a few hours? Explain.
Name the following:
Water is absorbed from the soil by which part.
