Brey-Lecture 2

Brey-Lecture 2 - Evolution Today Insect Resistance to...

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Evolution Today – Insect Resistance to insecticides o Colorado Potato Beetle – spray with insecticide o Survivor reproduces and passes down resistance gene insecticide ineffective o Changing allele frequency Microevolution – change in allele frequency Macroevolution – many of these changes coming together coming over a long period of time to produce difference species o Rabbits introduced to Australia – no predators to rabbits ran amuck Introduced virus known to kill rabbits (99.8%) kill Applied virus 2 nd (90%) 3 rd time (40%-60%) Why study evolution? Help us study resistance Help us study HIV and AIDS and similar virus o SIV – very similar Misconceptions o “Evolution is a theory about the origin of life.” o “Evolution is like a climb up a ladder of progress; organisms are always getting better.” o “Natural selection involves organisms ‘trying’ to adapt” Don’t try make with what they have o “Evolution means that life changed ‘by chance’ “ Not chance, survival of the fittest o “Evolution is a theory in crisis and it is collapsing as scientists lose confidence in it” o “Evolution is not science because it is not observable or testable.” o “Evolution and religion are incompatible” Lamarck’s though was flawed by focusing on individuals
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Brey-Lecture 2 - Evolution Today Insect Resistance to...

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