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Published byAgatha Norton Modified over 8 years ago
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Through natural selection, species evolve as they adapt to Earth’s changing environments.
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What evidence from living species supports the theory that species descended from other species over time? How are Earth’s organisms related? Biological Evidence of Evolution
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comparative anatomy homologous structure analogous structure vestigial structure embryology Biological Evidence of Evolution
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Evidence for Evolution
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Evidence for Evolution (cont.)
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How do homologous structures provide evidence for evolution ?
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Ostrich- Flightless Bird
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Evidence for Evolution (cont.) How are vestigial structures evidence of descent from ancestral species?
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Evidence for Evolution (cont.) embryology from Greek embryon, means “to swell” and from Greek logia, means “study of”
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Evidence for Evolution (cont.) How do pharyngeal pouches provide evidence of relationships among species?
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Evidence for Evolution (cont.) How is molecular biology used to determine relationships among species?
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Evidence for Evolution (cont.)
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The Study of Evolution Today
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By comparing the anatomy of organisms and looking for homologous or analogous structures, scientists can determine if organisms had a common ancestor.
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Some organisms have vestigial structures, suggesting that they descended from a species that used the structure for a purpose.
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Scientists use evidence from developmental and molecular biology to help determine if organisms are related.
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A.analogous structures B.homologous structures C.pharyngeal pouches D.vestigial pelvis What term refers to body parts that perform a similar function but differ in structure?
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A. adaptation B.embryology C.comparative anatomy D.molecular biology What is the name for the science of the development of embryos from fertilization to birth?
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A.adaptation B.embryology C.comparative anatomy D.molecular biology Which describes the study of similarities and differences among structures of living species?
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5. Living species contain no evidence that they are related to each other. 6.Plants and animals share similar genes. Do you agree or disagree?
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