BIOL 190 Lecture Notes - Lecture 33: Convergent Evolution, Coevolution, Mitochondrion
2 Dec 2016
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Document Summary
Bats have adaptations that allow them to hunt moths. Ears that are sensitive to ultrasound has convergently emerged multiple times ability to produce ultrasound also has evolved convergently many times. Coevolution: mutualistic positive-positive changes where each species bene ts. Ex: mitochondria relationships between bacteria and eukaryotes. Negative tness effects one group predation parasitism promote counter-adaptations. Arms race: multiple species many species involved. Reciprocal evolutionary change between ecologically intimate species, driven by natural selection, resulting in selective feedback loop. Ringe in speci city of coevolution one-on-one entire ecological groups affected by predators called diffuse. Obligate is highly speci c it is necessary, without it a partner may die. Facultative useful, but organism can live without it. Have begun farming fungus or other insects for food some ants grow domesticated fungus that may only grow within ant nest ants cannot obtain needed nutrients from other food sources. Some ants protect caterpillars that poop sweet dinner for the ants.
