BIOLOGY 1M03 Study Guide - Final Guide: Sympatric Speciation, Allopatric Speciation, Ecosystem Ecology
4 May 2016
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Document Summary
Cell theory: describes the properties of cells based on the implication that single celled organisms, and multicellular organisms in a population are related by common ancestry (cells existing because of pre-existing cells or descend from preexisting cells). Living organisms: replicate-able and reproductive organisms that use energy, evolve and are made up of cells that store/process heritable information. Natural selection: requires variation, heritability, and influences of fitness to occur. Evolution: occurs when heritable variation leads to differential success; descent with modification. Darwin and wallace proposed that it affects populations. Artificial selection: human driven natural selection towards evolution depending on number of genes, environment, deleterious consequences and the limits (often results in domesticated organisms). Intended a. s (broccoli, bigger chicken, etc. ) and unintended a. s (trophy hunting decreasing animal size and increasing reproductive age). Speciation: formation of new distinct species during evolution; occurs when populations of same species become genetically isolated; lack of gene flow allows natural.
