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APES Unit 2 Exam Review NotesEvolution Genetic _____________ in a population of species _____________Adaptation: _____________ traits that helps an organism better survive in its environment Natural Selection: some organisms are better able to _____________ and reproduce than other Coevolution: 2 populations of species _____________ each others evolution over a long period of timeMutation: genetic changes in DNA that occur randomly, can _____________ evolution Types of Selection397637011112500SpeciationAllopatric: species are separated by a _____________ barrier and cannot cross-breed, leading to _____________ evolution and speciationSympatric: species are _____________ separated but changes in _____________ leads to a lack of mating and eventual speciationTypes of SpeciesIndicator: alerts us to _____________ in the environment _____________ than other species due to their sensitivity to changes Foundation: _____________ the environment in a way that _____________ other species Keystone: species that exert a _____________ influence over an ecosystem and is _____________ on by many other species Generalist and SpecialistGeneralist Species: occupy _____________ niches, eat a _____________ of food, can withstand varying conditions Specialist Species: occupy _____________, narrow niches often with specific food sources, _____________ to changes and more prone to extinction should conditions change Succession PrimaryNO _____________Volcanoes Glacier _____________Starts with _____________ species making soil End with _____________ CommunitySlowerSecondary_____________ soil Fires _____________ agricultural fields Floods Small plants grow back _____________quicker359346530226000-21399530162500Intermediate Disturbance HypothesisEcosystems can withstand a _____________ amount of disturbance and it often _____________ biodiversity more than a low or high amount of disturbance A _____________ amount of disturbance can lead to _____________BiodiversitySpecies _____________ is the number and variety of species contained in a habitat Species richness: number of species _____________Species evenness: refers to whether or not species are in _____________ abundanceIn a rainforest there is high species _____________A pine forest would have _____________ species evenness 451104010985500Island Biodiversity-13970022034500Range of Tolerance ................
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