The diagrams below are illustrations of an experiment to demonstrate a biological principle.
Study the diagrams carefully and answer the questions that follow.
(i)
Name the parts labelled I and II.
(ii)
State two differences between the set-ups A and B.
(iii)
What is the role played by the part labelled I in the experiment?
(iv)
Name the biological principle being demonstrated in this experiment.
(v)
State one way in which plants benefits from the principle named in (iv).
(vi)
State one way in which animals benefit from the principle named in (iv).