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Molecular similarities provide evidence for the shared ancestry of life. DNA sequence comparisons can show how different species are related. Biogeography, the study of the geographical distribution of organisms, provides information about how and when species may have evolved.
Origins and biochemical evidence. By studying the basic biochemistry shared by many organisms, we can begin to piece together how biochemical systems evolved near the root of the tree of life.
ES en Español. Biogeography. The distribution of species on Earth provides evidence that informs our understanding of both the evolution of life and the movement of continents across the globe via plate tectonics.
By examining the chemical make-up of different living things, we can see how closely they are related. One class of biochemical evidence of evolution, homologous molecules, is biochemicals that are very similar in structure and function in all organisms. An example of a homologous protein is cytochrome c.
The evolution of biogeochemistry, retraces the important historical steps in part, covered by Gorham (Biogeochemistry 13:199–239, 1991) in the 18–19th centuries—with new emergent linkages and trends in 20–21st centuries.
- Thomas S. Bianchi
- tbianchi@ufl.edu
- 2021
4 days ago · This absence of many species from a hospitable environment in which an extraordinary variety of other species flourish can be explained by the theory of evolution, which holds that species can exist and evolve only in geographic areas that were colonized by their ancestors. Molecular biology.
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Apr 26, 2017 · Introduction. About a century and a half ago, in his book On the Origin of Species, Charles R. Darwin proposed natural selection (NS) as the main driving force that guides the evolution of species, conceived as a process of descent with modification from a common ancestor.
