Environmental facts and photosynthesis

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1. Why is temperature a factor which can affect the rate of photosynthesis?

  • It affects the enzymes
  • It affects the photosynthesis directly
  • It affects the leaves
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2. These are all factors needed for photosynthesis, which one is not environmental?

  • Water
  • Chlorophyll
  • Suitable temperature
  • Carbon dioxide
  • Light

3. To see if photosynthesis has occured it involves boiling the leaf in alcohol to remove the colour then staining with iodine, blue-black indicates starch (which is how glucose is stored). Which experiment?

  • Testing leaves for starch
  • Using oxygen and carbon dioxide sensors
  • Removing carbon dioxide

4. Why is a suitable temperature needed?

  • So the plant doesn't die
  • So the enzymes which control photosynthesis can work well
  • So the water doesn't dry up

5. What is from the soil and one of the raw materials for photosynthesis?

  • Water
  • Carbon dioxide
  • Chlorophyll
  • Light

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