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| Indeed, evidence of evolution clearly and strongly supports the theory that species do evolve with time through such processes as natural selection and genetic variation. Such evidence comes from different scientific disciplines ranging from paleontology to comparative anatomy, molecular biology, and embryology. Perhaps the most valuable of all fossil records tells the history of evolution itself. The fossil records have described this history of life on earth, together with some transitional forms that indicate how these changes have taken place because of evolution. For instance, fossil records show how the vertebrates came from aquatic to terrestrial setting-from fish to amphibians. Comparative anatomy supports the theory of evolution by studying the similarities and differences in between different anatomy structures that might exist among species. The forelimbs of vertebrates functionally are examples of homologous structures, sharing common ancestry, though the body parts work differently; insect wings and bird wings are analogous structures. Different species ended up with similar adaptations independently as shown in these examples. Another differing proof of molecular biology is through the studies of genetic material. DNA sequencing and protein comparison establish similarities in genetics between the species and, thereby, in a common heritage of evolution. Those genes that are conserved across organisms suggest a common ancestry and evolutionary processes among all organisms. Another window of insight is made by embryology: similar stages of embryonic development among species imply evolutionary relationships. For example, early stage embryos of vertebrates reveal similarities with common structures, relating to their evolutionary origin. In sum, this evidence, which includes fossils, anatomy, molecular biology, and embryology, composes a comprehensive framework that provides support for the theory of evolution and dynamic history of life on Earth. |
Evidence of Evolution Online Quiz
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- Test Name: Evidence of Evolution MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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