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Podcast: Exchanges: A Cambridge UP Podcast
Episode: Justin Garson, "What Biological Functions are and Why They Matter" (Cambridge UP, 2019)
Description: Why do zebras have stripes? One way to answer that question is ask what function stripes play in the lives of zebras – for example, to deter disease-carrying flies from biting them. This notion of a function plays a central role in biology: biologists frequently refer to the functions of many traits of evolved organisms. But not everything a trait causes is its function – the stripes might disorient some harmless birds, but that isn’t their function. So what determines the function of a trait? And what sort of explanations are offered when biologists claim that a trait has a partic...