BIO201H5 Lecture Notes - Lecture 4: Coevolution, Selective Breeding, Pollination
Document Summary
What process in nature causes natural selection: competition, limited resources cause competition for resources (ex. Food, water, shelter: predation, predators organisms eating each other, symbiosis, different species living in close proximity/direct contact with organism of another species, affect each other, co-evolve together because of how close living together they are, ex. Madagascar orchid and moth: only this moth can pollinate this flower (they co-evolved to become dependant on each other, doesn"t just have to be beneficial, mutualistic (beneficial to both, ex. Pollination: parasitic (one organism benefits, the other doesn"t, ex. Tape worm: neutral (neither benefit or get harmed) In evolutionary terms, 2 components: survive to adulthood, reproduction, passing on genetic components, organism have inherited best combination of traits from successful ancestors that enables them to successful survive and reproduce. Red allele has low frequency in original population, travelers happen to have red allele, new population has high red allele frequency: ex.
