Answer:
Step-by-step explanation:
Answer:
Independent variable: Day length
Dependent variable: Plant growth
Step-by-step explanation:
An experiment is performed to test the dependent variable while the independent variable is changed to observe its effects on dependent variable.
In the given experiment, effect of day length of the plant growth is being testes. Hence, the day length is independent variable which is changed in experiment to observe its effect on plant growth (the dependent variable).