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प्रश्न
Give Reasons for the following:
Guard cells are small in size and are kidney-shaped in outline.
उत्तर
Because of their small size, guard cells are rapidly influenced by turgor changes. Because of their kidney-shaped outline, they remain joined at their ends. This concave-convex curvature of the two guard cells can be varied easily and this further facilitates the stomatal pore to open and close easily.
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संबंधित प्रश्न
Name the following:
openings on the stem through which transpiration occurs.
Distinguish between the following:
Stomata and lenticels
Given ahead is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the question that follow:
After about half an hour what change, if any, would you expect to find in the cobalt chloride paper placed on the dorsal and ventral sides of the leaf? Give a reason to support your answer.
Given below are the diagrams of a certain structure in plants in two conditions.
(i) Name the structure shown.
(ii) Name the parts numbered 1-5.
(iii) What is the most apparent difference between A and B in the structure shown?
(iv) Describe the mechanism which brings about the change in the structure depicted in A and B.
Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow :
(i) Name the apparatus.
(ii) Mention one limitation of this apparatus.
(iii) Which phenomenon is studied with the help of this apparatus?
(iv) What is the function of the part marked ‘reservoir’?
(v) What is the role of the air bubble in the experiment?
Mention the differences between stomatal and lenticular transpiration.
Name the following:
The openings on the barks of trees through which transpiration occurs.
The upper layer of mesophyll in a leaf consists of elongated ground tissue called ______.
Name the three kinds of transpiration.
