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प्रश्न
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Mention one distinct difference between the parts labelled A and B.
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उत्तर
|
Cell wall |
Cell membrane |
|
The cell wall of a root hair is freely permeable and allows both salt and water to pass through. |
The cell membrane of a root hair is semi-permeable and does not allow large dissolved salt molecules to pass through. |
संबंधित प्रश्न
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.
Root hairs become flaccid, when fertilizers are added to the moist soil around it. Explain.
Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.
________ type of tissues are present in epiphytic roots.
Draw a neat and labelled diagram of the Root tip showing the root hair zone.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
How many regions are there in a typical root?
