Apply safe and valid practical design to plant-response investigations, including control variables, repeats, light direction and gravity treatment.

In the subtopic Control and coordination, this learning objective focuses on apply safe and valid practical design to plant-response investigations, including control variables, repeats, light direction and gravity treatment. Within Plant hormones (biology only), students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include gravity and light. control variables means factors that are kept constant during an experiment to ensure that the results are valid. Avoid students often forget to identify and control variables that could affect the outcome of their plant-response investigations, leading to unreliable results; instead ensure to list all control variables and explain their importance in maintaining the validity of the experiment. For exam answers, when designing your plant-response investigation, ensure you identify and control all variables, including light direction and gravity treatment, and plan for repeats to validate your results.