Question 43
Do germinating seeds release carbon dioxide during respiration? Carry out the following experiment to find out. Work in pairs. Moisten a handful of pea or bean seeds to start germination. Place the seeds in a conical flask. Gently fit a bung with a bent tube in it into the conical flask, as shown in Figure 2.20. Make sure the bung seals the flask. Place the other end of the bent tube into a beaker containing fresh limewater. Wear goggles when handling limewater. How might your results be affected if you did not seal the flask properly? Explain your answer.
