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GED Science

Lessons 7 & 8 Evolution and Natural Selection & Ecosystems

TermDefinition
Charles Darwin (1809-1882) British naturalist whose observations in the Galapagos Islands led him to formulate the theory of evolution
evolution change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift
adaptations traits that help an organism survive in its environment
natural selection a process that allows individuals that are better adapted to their environments and more likely to survive and reproduce, passing their favorable adaptations to their offspring
variations members of a species who have different traits
ecosystem an area consisting of a community of organisms (plants, animals, fungi, bacteria) and the physical environment in which they live (soil, air, water, climate)
biosphere Earth as a whole is an enormous ecosystem called this
producers these organisms use energy from the sun to make their own food through photosynthesis
consumers these organisms depend on producers to meet their energy needs
food web the complex pattern in which energy passes through an ecosystem (who produces and consumes what)
Created by: jpiittmann