CHAPTER 5 - CHAPTER 5: ECOLOGY BIODIVERSITY!? Biological...

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CHAPTER 5: ECOLOGY BIODIVERSITY!? Biological evolution: genetic change in populations of organisms overtime o Natural selection: traits that enhance survival and reproduction ( fitness) are passed on more frequently o Antibiotic/pesticide resistance Darwin’s Theory: Origin of Species o Organisms face constant struggle to survive/reproduce o Tend to produce more offspring than can survive o Offspring vary in their characteristics and their ability to survive o Some offspring are better suited to their environment o Pass on better characteristics – prevalent in future generations adaptive trait: trait that promotes fitness mutation: accidental changes in dna pass onto next generation o (in nature, mutation usually dangerous) o Non-lethal mutations can help sometimes tho Artificial selection : human directed selection Species : population whose members share characteristics can freely breed with one another and produce fertile offspring Population: group of members of one species that live in same area
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CHAPTER 5 - CHAPTER 5: ECOLOGY BIODIVERSITY!? Biological...

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