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EspañolTREE OF LIFE (SCIENCE)
:''See also Tree of life (disambiguation) for other meanings of the Tree of Life.''
Charles Darwin believed that phylogeny, the ascent of all species through time, was expressible as a metaphor he termed the 'Tree of Life'.
An excerpt from Darwin's ''The Origin of Species'' explaining his views on the 'Tree of Life' follows:
The model still hold for eukaryotic life forms, the multicelluar plants and animals. Modern biologists now recognise, however, that the prokaryotes, the bacteria, have the ability to transfer genetic information between unrelated organisms. Recombination, gene loss, duplication, and gene creation are a few of the processes by which genes can be transferred within and between bacterial species, causing variation that’s not due to vertical transfer. The tree of life is not a useful way of modelling life at this level.
★ Phylogenetic tree
★ Doolittle, W. Ford, and Bapteste, Eric. ''Pattern pluralism and the Tree of Life hypothesis'' PNAS, February 13, 2007, vol. 104, no. 7, 2043-2049. ( Reported At PhyOrg.com March 12, 2007 )
★ Tree of Life Web Project - explore complete phylogenetic tree interactively
Darwin's work was originally entitled Phylogeny via Oogeny.
Charles Darwin believed that phylogeny, the ascent of all species through time, was expressible as a metaphor he termed the 'Tree of Life'.
| Contents |
| Darwin's Tree of Life |
| The tree of life today |
| See also |
| Footnotes |
| References |
| External links |
Darwin's Tree of Life
An excerpt from Darwin's ''The Origin of Species'' explaining his views on the 'Tree of Life' follows:
The nineteenth century conception of the Tree of Life as seen by Ernst Haeckel in the ''The Evolution of Man'' (1879)
The tree of life today
The model still hold for eukaryotic life forms, the multicelluar plants and animals. Modern biologists now recognise, however, that the prokaryotes, the bacteria, have the ability to transfer genetic information between unrelated organisms. Recombination, gene loss, duplication, and gene creation are a few of the processes by which genes can be transferred within and between bacterial species, causing variation that’s not due to vertical transfer. The tree of life is not a useful way of modelling life at this level.
The Tree of Life image that appeared in Darwin’s ''On the Origin of Species by Natural Selection'', 1859. It was the only illustration in the book
See also
★ Phylogenetic tree
Footnotes
References
★ Doolittle, W. Ford, and Bapteste, Eric. ''Pattern pluralism and the Tree of Life hypothesis'' PNAS, February 13, 2007, vol. 104, no. 7, 2043-2049. ( Reported At PhyOrg.com March 12, 2007 )
External links
★ Tree of Life Web Project - explore complete phylogenetic tree interactively
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