'Clean air laws' presentation slideshows

Natural Selection & Adaptation

Natural Selection & Adaptation. Unit 9 7C. Natural Selection. Gradual process by which biological traits become either more or less common in a population.

1.46k views • 79 slides

Evolution by Natura l Selection

768 views • 66 slides

Evolution and Darwin

Evolution and Darwin. What is evolution?. X. A slow change over time. A heritable change in the characteristics within a population from one generation to the next. The development of new types of organisms from preexisting types of organisms over time. Evolution Primers.

751 views • 62 slides

Our Environment

Our Environment. Our planet should be safe to live on. Our country should be powerful and happy to live in. Our air should be unpolluted and clean to breathe. It is dangerous to breathe. Make Clean Air laws. Our rivers, lakes and seas should be clean and not dangerous to bathe in.

308 views • 14 slides

Industrial Melanism

Industrial Melanism. Peppered Moth 2 types: dark vs. light. light. Peppered moth. Peppered moth: Evolution in action. Year % dark % light 1848 5 95 1895 98 2 1995 19 81. ? clean air, light-colored bark. ? pollution, dark-colored bark. ? Clean Air Act, light-colored bark.

1.15k views • 3 slides