Environmental facts and photosynthesis

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1. 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
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2. Which is not a factor affecting the rate of photosynthesis?

  • Water - if there's enough water for the plant to survive there is plenty for photosynthesis
  • Temperature - does not affect photosynthesis, only the enzymes
  • Light intensity - they can only absorb so much light anyway
  • Level of carbon dioxide - they can only absorb so much carbon dioxide anyway

3. What is from the air and a raw materialfor the manufacture of carbohydrates?

  • Carbon dioxide
  • Light
  • Water
  • Chlorophyll

4. To monitor the rate of photosynthesis. Which experiment?

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

5. Which of these factors need for photosynthesis is chlorophyll?

  • In the chloroplasts in the leaf cells, to absorb light energy
  • A raw material for photosynthesis
  • Energy to make carbohydrates


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