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Biology Unit 5
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Topic 7: Run for your life

6. Describe how to investigate rate of respiration
practically.
You will need:
Respirometer. This is comprised of: two boiling tubes, one basket or cage (metal or plastic),
one 1 cm3syringe, two bungs, and one manometer (a capillary Utube fixed…

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Biology Unit 5
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3. Remove the potassium hydroxide solution from both tubes and wash them out with water.

4. Replace the basket containing seeds or invertebrates in tube B, an equivalent volume of water in the
other tube and the bungs in both. Set up the respirometer at…

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