How Scientific Progress Occurs

Book excerpt: Introduction -- Scientific revolutions: paradigm shifts, incrementalism, or both? -- The cell : from empty boxes to coordinated organelles -- The theory of the gene : from abstract point to nucleotide sequence -- Mutation : from fluctuating variations to base alterations -- The life cycle : from spontaneous origin to simple and complex stages -- The molecular basis of life : from vitalism to organic molecules to macromolecules -- Sex determination : from wild guesses to reproductive biology -- Genotype and phenotype relations : from variations to genetic modifiers to epigenetics -- Microbial life : from invisible spores to germs and prokaryotic organisms -- Embryology : from philosophic forms to epigenetic organogenesis -- Cell organelles : from cell theory to cell biology -- Evolution : from guesswork to natural selection, to molecular phylogeny -- How does science usually work?