Daphnia, or water fleas, increase in number in the spring through asexual reproduction. However, in the fall when stressful conditions occur, water fleas switch to sexual reproduction. Why? Explain the reasons behind this phenomenon.

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.