Write a Hypothesis The depth of the water may affect the colour of fish.
Bacterial growth may be affected by temperature.
Ultra violet (UV) light may cause skin cancer.
Temperature may cause leaves to change colour.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material