What are the two reactants in photosynthesis? A. Oxygen
B. Sugar
C. Water
D. Carbon dioxide

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations