7.1 Intro to evolution and natural selection - part 2
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9 Terms
what is natural selection?
certain individuals inherit traits > increased survival/ reproductivity
what drives natural selection?
environment imposing selective pressures > determine if traits are advantagous or not
how is natural selection important to evolution?
natural selection > genetic variation > adaptations > changes characteristics of populations
what are limiting resources?
resources in short supply compared to the needs of individuals/populations
how are limiting resources apply to evolution?
encourages competition > adaptations and strategies to better utilize available resources
what are some examples of adaptations from liming resources? (4)
aggresion, changes in feeding habits, migration, evolved specialized traits
what is differential reproductive success?
individuals have greater reproductive success based on ability to produce more viable offspring
what kinds of factors cause differential reproductive success? (2)
favorable traits increasing survival, better adaption to environment
how does differential reprodutive success play in natural selection?
advantageous traits become more common in later generations, less advantagous are gradually lost
