Describe the significance of diffusion. from Biology Transport in

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 Multiple Choice QuestionsShort Answer Type

21. What is the value of water potential to fully turgid cell and why ?
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22. Define the terms imbibition imbibant, imbibate and imbibition pressure.
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23. Describe the importance of imbibition.
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 Multiple Choice QuestionsLong Answer Type

24. What are the factors affecting the rate of diffusion?
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25. Describe the significance of diffusion.


Significance of diffusion :

1. The cell walls of plant cells remain moist due to diffusion of water molecules from one cell to the other.

2. The ions in the cells get uniformly distributed due to diffusion.

3. Transpiration is also due to diffusion of water vapour from intercellular space of spongy parenchyma into the atmosphere through stomata or cuticle.

4. The exchange of gases occurs through stomata due to diffusion.

5. The aroma or fragrance of flowers spreads due to the diffusion and insects are attracted for pollination.

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 Multiple Choice QuestionsShort Answer Type

26. Define osmosis. Give its types.
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 Multiple Choice QuestionsLong Answer Type

27. What is the significance of osmosis ?
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 Multiple Choice QuestionsShort Answer Type

28. Define the term diffusion pressure deficit (DPD) and also write its relation.
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29. Define the terms osmotic pressure and turgor pressure.
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30. Write note on solute potential.
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