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Photosynthesis (Adaptations (Contain chlorophyll in chloroplasts to help…
Photosynthesis
Adaptations
- Contain chlorophyll in chloroplasts to help absorb light
- Thin leaves so diffusion distances for gases are very short
- Veins which bring plenty of water in the xylem to the cells of the leaves and remove the products of photosynthesis in the phloem
- Broad leaves, allowing a bigger surface area for light to fall on
- Air spaces to allowed carbon dioxide in, and oxygen out of the leaves via diffusion
Plants have various adaptations to help photosynthesis occur as lots of light, carbon dioxide and water is required
- Guard cells which regulate the opening and closing of the stomata to regulate gas exchange
Rate of Photosynthesis
Plants need light, warmth and carbon dioxide if they are going to photosynthesize and grow as fast as they can
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Temperature
Photosynthesis is controlled by enzymes are most get denatured once the temperature rises to around 40-50 degrees Celsius
If the temperature gets too high, the enzymes denature and the rate of photosynthesis falls
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Light
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If there is plenty of light, photosynthesis can take place
What is Photosynthesis?
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Some glucose produced from the reaction is used by the cells immediately for respiration, but the majority is converted to insoluble starch and stored
In leaves there are small green parts called chloroplasts which contain a substance called chlorophyll
Nitrates, Proteins and Carnivorous Plants
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Some glucose is used to make amino acids. This is done by combining sugars with nitrate and other minerals ions from the soil
Cellulose and Starch
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Glucose is soluble in water so if glucose was stored it would affect the way the water moves in the cells via osmosis
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Making Lipids
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Plants use some of the glucose from photosynthesis and some of the energy obtained from respiration to build up fats and oils