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51. Describe the external factors affecting transpiration.

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52. What is apolast ?

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Internal factors affecting transpiration :

1.Surface area of leaf - Leves having larger surface are have more transpiration.

2.Thickness of cuticle - Thick cuticle layer lowers the rate of transpiration.

3. Number of stomata - more the number of transpiration more will be the transpiration.

4. Sunken stomata - lowers the rate of transpiration.

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54. What is symplast ?

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55. “Transpiration is a necessary evil.” Discuss.

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56. What is the cell called when water enters a plant cell due to diffusion causing a pressure built up against the cell wall

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57. What is the different between the stomata of dicots and monocots?

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58. Comment upon antitranspirants

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59. What is potometer ?

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60. Briefly describe the apoplast and symplast pathway.

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