A mutation is a change in trait. For example people who are lactose intolerant are normal, but people that can can drink milk without a problem have mutated. Hopefully this makes sense and helped.
Uses fins to walk , because they would have to adapt and evolve
Answer:
air pollution are handled via policies by inter _ governmental agencies.
That as you increase in trophic level 1/10th of the nutrients is lost. Starting at the consumers (plants) all the way to humans.
