Burning oil and coal adds  to the atmosphere.

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Which represents a negative impact of technology

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.