What is one of the functions of hair?

What would be an example of hypothesis for goldfish respiration lab

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.

Is dna the same in every cell in the human body explain your answer