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Ch 15 Coevolution
Terms in this set (14)
reciprocal evolutionary change between interacting species driven by natural selection; exerts selective pressures
bird eats seeds, poops out seeds, disperses
remora fish attach onto shark and each excess shark food
parasitism, herbivory, predators
selection that occurs in 2 species due to their interactions with one another.
results in geographic variation.
requires variation in both partners.
geographic mosaic theory
geographic structure of populations = effects of coevolution
negative frequency dependent selection
performance of alleles drop as they become more common.
as parasites increase, fitness of common host goes down.
lots of parasites on common host genotype - common host genotype becomes rare and other hosts get advantage due to higher fitness - parasite is selected for difference - new rare host genotype becomes common and the new parasites have higher fitness
newt and snake
myxoma and rabbit
bad = bad
good hides itself in bad
positive alleles increase mutualistic interaction and increases that allele
positive frequency dependent selection reinforces relationships
head lice evolves with humans
host switch, extinction, duplication
coevolutionary arms race
prey develops defense against predation - predator responds with evolution to counteract defense
fitness costs are higher for prey
THIS SET IS OFTEN IN FOLDERS WITH...
Ch 13 Speciation
Ch 14 Macroevolution
Ch 16 Behavior
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