The diagram below represents a structure found in a leaf. Study the sa

1.	The diagram below represents a structure found in a leaf. Study the same and answer the questions that follow :(i) Name the parts labelled A and B. (ii) What is the biological term for the above structure ? (iii) What is the function of the parts labelled A ? (iv) Mention two structural features of A, which help in the function mentioned in (iii) above. (v) Where is this structure likely to be found in a leaf ? (vi) The above structure helps in the process of transpiration Explain the term transpiration. (vii) How many other cells are found surrounding this structure as seen in the diagram.
Answer» (i) Part A = Guard Cells. Part B = Stoma. (ii) Biological term for the above structure is stomata. (iii) Part labelled A, i.e., guard cells control the opening and dosing of stomata. (iv) 1. Guard cells are structurally bean shaped. 2. Wall of guard cells are differently thick. It has inner wall facing towards the stomatal pore is thick and outer wall is thin. By changing the turgidity and flaccidity, guard cells control the opening and closing of stomata. (v) This structure is more likely to be found on the lower epidermis of the leaves. (vi) Plants absorb a large amount of water from the soil but only a fraction of.it is used by plants and most of this absorbed water is lost from the aerial parts of the plant in the form of water vapour. It is called transpiration. (vii) There are five (5) other cells surrounding this structure.

The diagram below represents a structure found in a leaf. Study the same and answer the questions that follow :(i) Name the parts labelled A and B. (ii) What is the biological term for the above structure ? (iii) What is the function of the parts labelled A ? (iv) Mention two structural features of A, which help in the function mentioned in (iii) above. (v) Where is this structure likely to be found in a leaf ? (vi) The above structure helps in the process of transpiration Explain the term transpiration. (vii) How many other cells are found surrounding this structure as seen in the diagram.

Answer»

(i) Part A = Guard Cells. Part B = Stoma.

(ii) Biological term for the above structure is stomata.

(iii) Part labelled A, i.e., guard cells control the opening and dosing of stomata.

(iv) 1. Guard cells are structurally bean shaped.

2. Wall of guard cells are differently thick. It has inner wall facing towards the stomatal pore is thick and outer wall is thin. By changing the turgidity and flaccidity, guard cells control the opening and closing of stomata.

(v) This structure is more likely to be found on the lower epidermis of the leaves.

(vi) Plants absorb a large amount of water from the soil but only a fraction of.it is used by plants and most of this absorbed water is lost from the aerial parts of the plant in the form of water vapour. It is called transpiration.

(vii) There are five (5) other cells surrounding this structure.

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