plants

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  • Created by: omer3
  • Created on: 29-05-15 14:32
gas exchange in plants
gaseous exchange occur through stomata which are tiny microscopic pores on the surface of the plant these lead into air spaces in the mesophyll layerof the cell
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how is the stomata controlled around the plant
around the stomata are two guard cells specially adapted epidermal cells which have outer walls thinner and more elastic than inner walls therefore when the cells are turgid they bend into kidney shape and create a wider opening
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facts about stomata
stomata open fuly in sunlight to let in carbon dioxide for phtosynthesis. water leaves plants through stomata by evaporation temp wind humidity have an effect water loss
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explain a compromise land organsims do
there must be a compromise between efficient gas exchange and reduced water loss because the best conditions for gas exchange allow loss of water from organsim
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xerophyte features to suit dry conditions
1.leaves of plants are reduced to spines to protectthe plant reduce waterloss2.waxy cuticle linning epidermis.extensive root network large uptake of water to plant can absorb carbon dioixde during the night so stomata notopen during heat of the day
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Card 2

Front

how is the stomata controlled around the plant

Back

around the stomata are two guard cells specially adapted epidermal cells which have outer walls thinner and more elastic than inner walls therefore when the cells are turgid they bend into kidney shape and create a wider opening

Card 3

Front

facts about stomata

Back

Preview of the front of card 3

Card 4

Front

explain a compromise land organsims do

Back

Preview of the front of card 4

Card 5

Front

xerophyte features to suit dry conditions

Back

Preview of the front of card 5

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