1 - i1*19*11 Biology 1420 Levels of Organization covered....

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i1*19*11 Biology 1420 Levels of Organization covered. Single cell organism Multicellular organism Population Community A community and its nonliving environment is an ecosystem The entire surface of the earth including living and nonliving components is the biosphere 1.2 Evolution is the process by which modern organisms descended with modifications from preexisting forms of life. Evolution explains how diverse forms of life originated through changes in their genetic makeup. Darvin an wallace formulated the basis of our modern understanding of evolution They did not know the mechanism that produced change Evolution arises as a consequence of three natural processes. Genetic variation arises from mutations that occur in segments of DNA (genes) These mutations alter informational content of the gene Those variation may be inherited by offspring of parents carrying Mutations passed trhough many generations cause members of a species to be slightly different Genetic variability continued Effects of mutation o No effect harmless o A decrease in the organisms ability to function o Death of the organism o An increase in an organisms ability to survive and reproduce(rare)
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As species come in others go out. Species that cannot adapt to environmental change go extinct for
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1 - i1*19*11 Biology 1420 Levels of Organization covered....

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