BIOL-N - Biology BIOL-N 107 Lecture Notes - Lecture 2: Mitochondrion, Sea Anemone, Parasitism

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+ type 1 - higher mortality towards end of life. + type 2 - equal mortality rates throughout life. + type 3 - higher mortality at beginning. + r-selection: traits that maximize number of offspring. + most organisms have a mixture of these traits. Predation can serve as a selective pressure that shapes life patterns: + guppies that live with killi sh vs. guppies that with cichlids. + nearly 1/5 of human population lives in severe poverty. + more than 1 billion lack access to clean water. + rising populations will only increase pressure on limited resources. + one of a few species to be able to live in such a broad range of habitats. + great capacity to disperse fast over long distances. + shift to agriculture vs hunter/gatherer lifestyle increase carrying capacity. + about 300 years ago, malnutrition and disease kept death rates high enough to more or less balance birth rates.

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