Biology 1001A Lecture Notes - Lecture 22: Vertically Transmitted Infection, Host Switch, Evolutionary Arms Race
2 Dec 2016
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Document Summary
Mutualistic, competitive and antagonistic relationships between species, given "real world" examples. Mutualistic: both species benefit, form of cooperation. Competitive: both may incur costs, two species fighting for access to the same resource. Plants competing for sunlight, soil, water. Antagonistic: one may use the other as a resource (exploiter benefits, resource suffers) Factors that advantage one side or the other in an evolutionary arms race. May keep escalating until the costs of continuing to escalate outweigh the benefits (red queen equilibrium) Garden snakes evolve: greater and greater resistance to toxins. Speed of evolution: one species may take fewer generations to evolve certain traits, allowing it to get ahead of the other species in terms of evolutionary advantage. Size of population: if o(cid:374)e spe(cid:272)ies" populatio(cid:374) is larger tha(cid:374) the other spe(cid:272)ies, it (cid:449)ill ha(cid:448)e an advantage due to it being more likely to produce beneficial mutations to outcompete the other species.
