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Biology: B4 (Ecology in the local environment (Ways of sampling: (Pitfall…
Biology: B4
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Photosynthesis
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Plants photosynthesise only during the day as they need sunlight but they respire (give out carbon dioxide) during the day and night. Plants photosynthesise a lot faster than they respire which is why they give out a lot of oxygen
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Plants need minerals
Active transport requires energy as it is the absorption of substances from a low concentration to a high concentration
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Diffusion and Osmosis
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In the plants, at night diffusion stops and oxygen dffuses into the cell and carbon dioxide out (respiration) and stomata are adapted to open and close. The open to allow diffusion and close to prevent too much water loss
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Transport in plants
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The rate of transpiration is affected by high light intensity, high temperatures, increased air movement and high humidity
Farming
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Hydroponics is a way of growing plants without soil as they are placed in a way so that their roots have access to a a solution which has all of the minerals that the plant needs
Biological control is when a farmer may want to introduce a predator to kill off the pests in the area
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