Answer:
buffers
Explanation:
Buffers neutralize acids and bases.
Glucose can diffuse from the digestive tract into the human blood system without first being digested.
D, different species in the world
Answer:
Energy that is not used in an ecosystem is eventually lost as heat. Energy and nutrients are passed around through the food chain, when one organism eats another organism. In each case, energy is passed on from one trophic level to the next trophic level and each time some energy is lost as heat into the environment.
Explanation:
