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15.2 notes What are evidences of evolution?

15.2 notes What are evidences of evolution?. Section 2 Evidence of Evolution. Chapter 15. Objectives. Relate several inferences about the history of life that are supported by evidence from fossils and rocks.

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15.2 notes What are evidences of evolution?

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  1. 15.2 notesWhat are evidences of evolution?

  2. Section 2 Evidence of Evolution Chapter 15 Objectives • Relateseveral inferences about the history of life that are supported by evidence from fossils and rocks. • Explainhow biogeography provides evidence that species evolve adaptations to their environments. • Explainhow the anatomy and development of organisms provide evidence of shared ancestry. • Comparethe use of biological molecules with other types of analysis of evolutionary relationships. • Describethe ongoing development of evolutionary theory.

  3. Section 2 Evidence of Evolution Chapter 15 The Fossil Record • Evidence of evolution can be found by comparing several kinds of data, including the fossil record, biogeography, anatomy and development, and biological molecules. • Evolutionary theories are supported when several kinds of evidence support similar conclusions.

  4. Section 2 Evidence of Evolution Chapter 15 The Fossil Record, continued • The Age of Fossils • Geologic evidence supports theories about the age and development of Earth. • Principle of superposition - as long as the rock strata has not been disturbed, then the lowest strata formed before the strata above it. • Geologic time scale was devised to determine relativeage (how old fossil is compared to other fossils) of a fossil. • Absolute age (age since formation) can be determined by radiometric dating.

  5. The Distribution of Fossils • The fossil record shows that the types and distribution of organisms on Earth have changed over time. • Transitional Species • Fossils of transitional species show evidence of descent with modification.

  6. Section 2 Evidence of Evolution Chapter 15 Evidence of Whale Evolution

  7. Section 2 Evidence of Evolution Chapter 15 Biogeography • Biogeography, the study of the locations of organisms around the world, provides evidence of descent with modification.

  8. Section 2 Evidence of Evolution Chapter 15 Anatomy and Physiology • In organisms, analogous structures are similar in function but have different evolutionary origins. • Homologous structures have a common evolutionary origin.

  9. Section 2 Evidence of Evolution Chapter 15 Forelimbs of Vertebrates

  10. A species with a vestigial structure probably shares ancestry with a species that has a functional form of the structure.

  11. Section 2 Evidence of Evolution Chapter 15 Vestigial Features Click below to watch the Visual Concept. Visual Concept

  12. Section 2 Evidence of Evolution Chapter 15 Anatomy and Physiology, continued • Related species show similarities in embryological development.

  13. Section 2 Evidence of Evolution Chapter 15 Similarities in Embryology Click below to watch the Visual Concept. Visual Concept

  14. Section 2 Evidence of Evolution Chapter 15 Biological Molecules • Similarity in the subunit sequences of biological molecules such as RNA, DNA, and proteins indicates a common evolutionary history.

  15. Section 2 Evidence of Evolution Chapter 15 Hemoglobin Comparison

  16. Section 2 Evidence of Evolution Chapter 15 Developing Theory • Modern scientists integrate Darwin’s theory with other advances in biological knowledge. • Theories and hypotheses about evolution continue to be proposed and investigated.

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