The diagram below illustrates an experiment to show carbon (IV) oxide is necessary for photosynthesis. The corks have been smeared with Vaseline to prevent entry of gases.
- Why is it necessary to place the plants in the dark for two days before starting the experiment?
- What is the role of soda lime?
- Give the results you would expect if the leaves A and C were subjected to an iodine test after being in bright sunlight for 6 hours.
- Explain the results given in (C ) above