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understanding evolution has _____ applications such as fighting diseases and saving endangered species
natural selection act's on individual's _____ and the population evolves (allele frequencies change)
small evolutionary changes accumulate over long time periods and generate large evolutionary changes like ____
natural selection reduces the representation of less advantagous traits in the _____ environment (but environments change!)
as environments change, the traits that lead to increased ______ can also change
sanitation, nutrition, antibiotics
_____, _____, ______ greatly reduced cases of TB over 1950-1990 but now it is coming back
human activities (changing environments) are causing ___________ natural selection
directional natural selection unintentionally caused by humans: hundreds of disease causing bacteria have evolved resistance to antibiotics
directional natural selection unintentionally caused by humans: over 600 species of insects and mites have evolved resistance to pesticides
directional natural selection unintentionally caused by humans: hundreds of weedy plants have evolved resistance to herbicides
directional natural selection unintentionally caused by humans: this is NOT ____ (because is unintended)
a pattern of natural selection in which heterozygous individuals have higher fitness then homozygous individuals
example of balancing selection: carriers of sickle-cell anemia are more resistant to than HH genotypes
if having ____ morphological complexity leads to higher fitness, then the frequency of those alleles will increase in a population (regressive evolution)
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