what is meant by evolution ? evidence of evolution
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During and since Darwin's time, people have been looking for and studying evidence in nature that teaches them more about evolution. Some types of evidence, such as fossils and similarities between related living organisms, were used by Darwin to develop his theory of natural selection, and are still used today. Others, such as DNA testing, were not available in Darwin's time, but are used by scientists today to learn more about evolution.
Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos. Another important type of evidence that Darwin studied and that is still studied and used today is artificial selection, or breeding.
During and since Darwin's time, people have been looking for and studying evidence in nature that teaches them more about evolution. Some types of evidence, such as fossils and similarities between related living organisms, were used by Darwin to develop his theory of natural selection, and are still used today. Others, such as DNA testing, were not available in Darwin's time, but are used by scientists today to learn more about evolution.
Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos. Another important type of evidence that Darwin studied and that is still studied and used today is artificial selection, or breeding.
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In the mid-19th century, Charles Darwin formulated the scientific theory of evolutionby natural selection, published in his book On the Origin of Species (1859). Evolution by natural selection is a process first demonstrated by the observation that often, more offspring are produced than can possibly survive.
what are the five evidences of evolution
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fossil record, biogeography, comparative anatomy, comparative embryology, molecular biology
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Fossil Record
Oldest evidence of organisms that are now extinct used to create a timeline & relationship to new (extant) species. Fossils found in sedimentary rock, using relative dating to create that timeline.
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Terms in this set (9)
Fossil Record
Oldest evidence of organisms that are now extinct used to create a timeline & relationship to new (extant) species. Fossils found in sedimentary rock, using relative dating to create that timeline.
Biogeography
Using fossils of extinct species and their location is to create a relationship with extant species & where they are on the earth.
Understanding plate tectonics & continental drift help to create a more reliable cladogram/phylogeny (evolutionary history)
Comparative Anatomy
loading @ common features comparing anatomical structures. Looking at homologous structures to determine how closely related
Evidence of divergent evolution (share a common ancestor)
- looking @ Analogous structures
Evidence of convergent evolution (not a common ancestor but similar environmental pressure)
- Vestigial Structures
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analogous structures definition and example
performs a similar function but comes from different evolutionary descent ex. fins of a shark and dolphin
Vestigial structures definition and example
throwbacks to the past traits that are no longer used.
ex. femer of a whale and its relationship to terrestrial species (other mammals)
Comparative embrylogy
looking @ shared developmental stages. the more common stages the more closely related.
ex. gill slits & tailbone
* development is controlled by genes
Molecular biology
* most powerful & most recent
comparing the genes of DNA & comparing amino acid sequences of proteins the more differences the longer the organisms have been separated from common ancestor
what are the five evidences of evolution
fossil record, biogeography, comparative anatomy, comparative embryology, molecular biology
what are the five evidences of evolution
CLICK THE CARD TO FLIP IT
fossil record, biogeography, comparative anatomy, comparative embryology, molecular biology
CLICK THE ARROWS BELOW TO ADVANCE
Fossil Record
Oldest evidence of organisms that are now extinct used to create a timeline & relationship to new (extant) species. Fossils found in sedimentary rock, using relative dating to create that timeline.
1/9
Upgrade to remove adverts
Only $1/month
Terms in this set (9)
Fossil Record
Oldest evidence of organisms that are now extinct used to create a timeline & relationship to new (extant) species. Fossils found in sedimentary rock, using relative dating to create that timeline.
Biogeography
Using fossils of extinct species and their location is to create a relationship with extant species & where they are on the earth.
Understanding plate tectonics & continental drift help to create a more reliable cladogram/phylogeny (evolutionary history)
Comparative Anatomy
loading @ common features comparing anatomical structures. Looking at homologous structures to determine how closely related
Evidence of divergent evolution (share a common ancestor)
- looking @ Analogous structures
Evidence of convergent evolution (not a common ancestor but similar environmental pressure)
- Vestigial Structures
Upgrade to remove adverts
Only $1/month
analogous structures definition and example
performs a similar function but comes from different evolutionary descent ex. fins of a shark and dolphin
Vestigial structures definition and example
throwbacks to the past traits that are no longer used.
ex. femer of a whale and its relationship to terrestrial species (other mammals)
Comparative embrylogy
looking @ shared developmental stages. the more common stages the more closely related.
ex. gill slits & tailbone
* development is controlled by genes
Molecular biology
* most powerful & most recent
comparing the genes of DNA & comparing amino acid sequences of proteins the more differences the longer the organisms have been separated from common ancestor
what are the five evidences of evolution
fossil record, biogeography, comparative anatomy, comparative embryology, molecular biology
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