Why antarctica takes 6 month to receive solar radiation?

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Which process is involved in growing crops? irrigation transportation recreation condensation

Why is excretion necessary to maintain homeostasis?