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biomes -

key terms

two reasons extinction occurs destruction of habitat and introduction of new species
evolution change in species over time
extinction when the last individual of species dies
natural selection organisms that are better adapted to an environment survive and reproduce at a greater rate than organisms that are not
mutation process in which DNA changes result in new alleles
adaptative radiation production of several species from one ancestoral species
nonliving environmental factors temperature, rainfall, pollution, fire, flooding, elevation, volcano eruption
living environmental factors predators, available food, population of species
Darwin's hypothesis of why there are so many living things of Earth different, long term environmental influences on populations produced the variety of species
Created by: tracy.leake