Biology 1001A Lecture Notes - Lecture 3: Drug Resistance, Falsifiability, Speciation

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Tom Haffie

Document Summary

Falsifiable: can be proved to be false. Non-falsifiable: cannot be proved to be false. Theory of evolution: descent with modification from a common ancestor. Evolution: allele frequencies in a population change from one generation to the next. All life is related through common ancestry. Lineages diverge (speciate) into daughter lineages: how a common ancestor can diverge into many other species. Evolution is variational, not transformational: populations evolve, individuals do not, darwinian evolution- acts on variations in population, do(cid:374)"t (cid:374)eed to rely o(cid:374) e(cid:374)viro(cid:374)(cid:373)e(cid:374)t for evolutio(cid:374) Most evolution is gradual: small changes between generations: transitional forms between ancient and modern species. Natural selection explains much (not all) evolutionary change: only force of adaptation, where species become better suited for their environment. What makes a theory scientific? (falsifiable, non-falsifiable: can never prove a(cid:374)ythi(cid:374)g eve(cid:374) if it"s (cid:374)o(cid:374)-falsifiable, be testable, falsifiable. If it is cannot be falsified, then it is well supported, not proven.