0 9 . 2 Describe how experiment B and experiment C acted as controls for the investigation. [2 marks] Experiment B Experiment C 0 9 . 3 Give two conclusions that the students could make from the ink marks on the shoot in experiment A. [2 marks] 1 2 0 9 . 4 Name the type of response shown by the seedling in experiment A.

Without the context of the experiments, it's difficult to provide specific answers. However, I can give you a general idea of how to approach these questions.

0 9 . 2 Experiment B and C could act as controls by providing a baseline to compare the results of the main experiment. For example, Experiment B could be a negative control where no changes are expected, and Experiment C could be a positive control where a known response is expected. This would help to validate the results of the main experiment.

0 9 . 3 Again, without knowing the specifics of the experiment, it's hard to give precise conclusions. However, the students could potentially conclude something about the growth rate of the shoot based on the ink marks. For example, if the ink marks are closer together, it could indicate slower growth. If they are further apart, it could indicate faster growth. They might