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Hen's Teeth and Horse's Toes: Further Reflections in Natural History

Book by Stephen Jay Gould · 4 quotes · Evolution, Form, Knows

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Hen's Teeth and Horse's Toes: Further Reflections in Natural History Quotes

“Organisms [...] are directed and limited by their past. They must remain imperfect in their form and function, and to that extent unpredictable since they are not optimal machines. We cannot know their future with certainty, if only because a myriad of quirky functional shifts lie within the capacity of any feature, however well adapted to a present role.”

IfsKnowsWellsPastFormLyingRolesCapacityMachinesFunctionCertaintyFeaturesImperfectOrganismsUnpredictableAdaptedQuirkyOptimal
Book:Hen's Teeth and Horse's Toes: Further Reflections in Natural History
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“A complete theory of evolution must acknowledge a balance between "external" forces of environment imposing selection for local adaptation and "internal" forces representing constraints of inheritance and development. Vavilov placed too much emphasis on internal constraints and downgraded the power of selection. But Western Darwinians have erred equally in practically ignoring (while acknowledging in theory) the limits placed on selection by structure and development what Vavilov and the older biologists would have called "laws of form.”

FormLawForceEnvironmentToo MuchTheoryDevelopmentEvolutionBalanceLimitsStructureWesternLocalsAcknowledgeInternalsEmphasisSelectionAdaptationInheritanceConstraintsRepresentingImposingBiologistTheory Of EvolutionExternal Forces
Book:Hen's Teeth and Horse's Toes: Further Reflections in Natural History
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“Since we proposed punctuated equilibria to explain trends, it is infuriating to be quoted again and again by creationists-whether through design or stupidity, I do not know-as admitting that the fossil record includes no transitional forms. Transitional forms are generally lacking at the species level, but they are abundant between larger groups.”

KnowsFormReligionLevelsRecordsGroupsDesignMinesEvolutionSpeciesStupidityTrendsAgain And AgainLackingFossilsEquilibriumAdmittingMiningPaleontologyInfuriatingBiological Evolution
Book:Hen's Teeth and Horse's Toes: Further Reflections in Natural History
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