BIO120H1 Lecture Notes - Lecture 12: Pesticide Resistance, Inbreeding Depression, Antimicrobial Resistance
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BIO120H1 Full Course Notes
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Evolution: pesticide resistance, antibiotic resistance, extinction of species. New mutations (in large populations, simple mutations introduced at high rate) E. g. outcrossing weeds: more pre-existing resistance variation than selfing. Multi-herbicide treatment makes new adaptation less likely, requires more complex adaptation. Rotation of different kinds of herbicides: weeds constantly hit by different selective pressures (could select for generalized resistance) In undisturbed ecosystems: 1 species lost every 10 years. Strategies for reducing in small populations (especially in captive animal species and founding individuals) Probability of adaptation depends on population size, rate of adaptation, strength of selection against common genotype. All organisms are related and share a common evolutionary history. Diversity is essential and important for driving innovation. Cooperation helped drive the evolution of complexity. Scientific enquiry relies on theory, studying patterns in nature, controlled experiments. Key component of science: continuous questioning and evaluating evidence. Understanding of natural world is always changing.
