BIOL 1010 Lecture Notes - Sickle-Cell Disease, Continental Drift, Genetic Drift

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Acquired characteristics are not passed on: traits that maximize individual survival become more common. Behaviours that increase fitness may be detrimental to an: humans are the pinnacle of evolution. Evolution hasn"t directed evolution toward a certain end point: complex organisms couldn"t have arisen by chance individual (humans) Environmental changes (floods, etc. ) that lead to survival of one type of organism at that point can be thought of as chance. Mollusc eyes: simple pigmented cells evolved into complex: there are gaps in the fossil record/missing links eyes. Environmental conditions that form fossils are rare. Transitional fossils were found for whales and their ancestors, birds and dinosaurs. Natural selection: adaptation for 1 process can conflict with another, natural selection is the mechanism that always leads to adaptive evolution and production of new species. Malaria: parasites live part of their live in blood cells. Sickle cell anemia: single change in hemoglobin gene, rbc is sickle shaped.

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