Well, in a way it is true, as, chloroplasts are the reason why plants photosynthesize. So, with the photosynthesis, it releases oxygen, which is the power generator for life on Earth, as we breathe in oxygen.
If your in alaska and do this experiment the weather conditions may affect the test results. if you go to australia the same can happen. there are many factors and variables in which an experiment can have different results.
D Because supports large numbers of plants and species and variety of crops