Chapter 18_evolution-and-the-origin-of-species.pptx -...

This preview shows page 1 - 6 out of 88 pages.

BIOLOGY 325: Inquiries in Biological ScienceChapter 18 Notes
Boundless.com/biology?campaign_content=book_1514_chapter_18&campaign_term=Biology&utm_campaign=powerpoint&utm_medium=direct&utm_source=boundlessEvolution and theOrigin of SpeciesUnderstanding EvolutionFormation of New SpeciesHybrid Zones and Rates of SpeciationEvolution of GenomesFree to share, print, make copies and changes. Get yours at Evidence of Evolution
What is Evolution?Charles Darwin and Natural SelectionThe Galapagos Finches and Natural SelectionProcesses and Patterns of EvolutionEvidence of EvolutionMisconceptions of EvolutionUnderstanding EvolutionEvolution and the Origin of Species > Understanding EvolutionFree to share, print, make copies and changes. Get yours at ct&utm_source=boundless
Ancient Greeks expressed ideas about evolution, which were reintroduced in theeighteenth century by Georges-Louis Leclerc Comte de Buffon who observeddifferent environments had different plant and animal populations.James Hutton proposed that geological changes occur gradually over time via theaccumulation of small changes rather than through large catastrophic events.Charles Lyell popularized James Hutton's theory; this theory of incrementalchange influenced Darwin's theory of evolution.Jean-Baptiste Lamarck proposed the theory of the inheritance of acquiredcharacterstics; this theory has now been discredited, but it served as animportant influence on the theory of evolution.What is Evolution?Free to share, print, make copies and changes. Get yours at t-is-evolution-494-11721?campaign_content=book_1514_chapter_18&campaign_term=Biology&utm_campaign=powerpoint&utm_medium=direct&utm_soEvolution by Natural SelectionView on Boundless.comEvolution and the Origin of Species > Understanding Evolution
Wallace traveled to Brazil to collect and observe insects from the Amazonrainforest.Darwin observed that finches in the Galápagos Islands had different beaks thanfinches in South America; these adaptations equiped the birds to acquire specificfood sources.Wallace and Darwin observed similar patterns in the variation of organisms andindependently developed the same explanation for how such variations couldoccur over time, a mechanism Darwin called natural selection.According to natural selection, also known as "survival of the fittest," individualswith traits that enable them to survive are more reproductively successful; thisleads to those traits becoming predominant within a population.

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 88 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
NoProfessor

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture