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PPE 3003 Lecture 2 01 23 2015 In order to be here what did our ancestors have to do Survive long enough to reproduce Successfully reproduce Evolutionary success evolution primer Natural selection o Variation caused by differences in genes o Heritability Some survive and reproduce some don t Some traits better enable survival more offspring o Offspring inherit traits that lead to success o Survival of the fittest NOT how physically healthy fit as in how equipped your genes are in environment o physical characteristics that helped our ancestors survive Thumbs Eyebrows Sense of smell o Adaptations Traits that help survival reproduction become more common in gene pool traits that hinder are selected against 01 23 2015 01 23 2015
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