mechanism of evolution biogeography- the study of where organisms live now and where they and their...
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Biogeography- the study of where organisms live now and where they and their ancestors lived in the past.
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Many recently discovered fossils form series that trace the evolution of modern species from extinct ancestors.
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The greatest shark to have ever lived! An apex predator, the Carcharodon megalodon comes from the Greek word for “big tooth”. This shark was as big as a bus at a length of 60 feet and estimated to
weigh between 30-60 tons. Their skeletons were made of cartilage, like those of modern sharks. This resulted in poor to no fossilization of their skeletons and therefore is rarely found in the fossil record.
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2. Comparative AnatomyA. Homologous Structures- similar structures that are different in function
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b. Vestigial Structures
•Structures that serve no apparent purpose in the organism that has it
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c. Analogous Structures
•Similar structures in unrelated organisms
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3. Embryological Development
• The comparative study of embryos during development at various stages
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4. Homologous Molecules
• Comparisons of DNA sequences and amino acid sequences in proteins
* Amino acid sequence of cytochrome c in human and chimp differs by one amino acid!
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Activity: Timing is
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