A way we can reduce disadvantages of human made materials is simply by finding new uses for them such as when plastic is molded and used for a container of a liquid.
Concentration gradient across the membrane. Proteins in the membrane allow specific molecules through, passively.
Answer:
Archimedes principle
Explanation:
Any object, totally or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.
Answer:
"plants release oxygen"
Explanation:
Photosynthesis is critical for the existence of the vast majority of life on earth...so we'll go with "plant release oxygen"