Question

Factors affecting Photosynthesis :

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Answer 1

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• Factors affecting Photosynthesis?

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• Light intensity
• Carbon dioxide concentration
• Temperature.

Answer 2

These are some factors which can affect photosynthesis

Light intensity

Without enough light, a plant cannot photosynthesise very quickly - even if there is plenty of water and carbon dioxide and a suitable temperature.

Carbon dioxide concentration

Carbon dioxide – with water – is one of the reactants in photosynthesis.

Temperature

The chemical reactions that combine carbon dioxide and water to produce glucose are controlled by enzymes. As with any other enzyme-controlled reaction, the rate of photosynthesis is affected by temperature.

The amount of chlorophyll also affects the rate of photosynthesis:

• plants in lighting conditions unfavourable for photosynthesis synthesise more chlorophyll, to absorb the light required
• plants in lighting conditions unfavourable for photosynthesis synthesise more chlorophyll, to absorb the light requiredthe effects of some plant diseases affect the amount of chlorophyll, and therefore the ability of a plant to photosynthesise, such as downy mildew in grape vines

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