EBio - notes13 - Evolution Population 12-11

EBio - notes13 - Evolution Population 12-11 - Chapter 22...

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Chapter 22 Descent with Modification VOCABULARY People: Linnaeus, Lamarck, Darwin Homology, taxonomy Acquired vs. inherited characters FIGURES: 22.6, 22.7, 22.13, 22.14, 22.15 Population: Group of interbreeding individuals of the same species in the same geographic area Natural Selection: individuals with specific heritable traits leave more offspring than other individuals Evolution: Change over time in the genetic composition of a population CONCEPTS 1. All of life is related 2. Populations change with time: evolve 3.Natural selection is an important mechanism for evolution Carolus Linnaeus Founder of taxonomy , the classification of organisms: Genera, species Interpreted organismal adaptations as evidence that the Creator had designed each species for a specific purpose Fossils Laid the groundwork for ideas about evolution Remains or traces of organisms from the past, usually found in sedimentary rock, which appears in layers or strata
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Homology Similarity resulting from common ancestry Homologous structures: anatomical similarities that represent variations on a structural theme present in a common ancestor Comparative embryology reveals anatomical homologies not visible in adult organisms Jean-Baptiste de Lamarck Hypothesized that species evolve through use and disuse and the inheritance of acquired traits The mechanisms he proposed are unsupported by evidence Darwin made two major points in his book: All of life is related: current species are ancestors of past species Natural selection: populations change over time if individuals with certain heritable traits leave more offspring
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EBio - notes13 - Evolution Population 12-11 - Chapter 22...

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