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3 reasons infanticide occurs

Poor offspring quality
Uncertain parentage
Lack of resources to raise offspring



Group of organisms of same species that breed with each other


Darwin influenced by who?

Lyell-geologist- small gradual changes lead to large changes
Malthus- limitations on pop. size= competition for resources


Darwin's 4 postulates

1) Individuals vary in their traits
2) Some of variation is heritable
3) More offspring are born than will survive to reproduce
4) Some individual are more likely to survive and reproduce than others (not random)