Evolution: Difference between revisions
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LUCA is the last universal common ancestor.<ref>Hartl, D.L. and Ruvolo, M. (2011) 'Genetics: Analysis of Genes and Genomes.' 8th edn. Burlington: Jones &amp;amp; Bartlett Learning.</ref> | LUCA is the last universal common ancestor.<ref>Hartl, D.L. and Ruvolo, M. (2011) 'Genetics: Analysis of Genes and Genomes.' 8th edn. Burlington: Jones &amp;amp;amp; Bartlett Learning.</ref> '''''<u><br></u>''''' | ||
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Revision as of 17:25, 21 November 2011
"Nothing in biology makes sense except in the light of evolution." - Theodosius Dobzhansky.
The word Evolution has has been defined as "the gradual developing of something."[1]
Some argue that evolution is strictly the change over time, in genes and proteins, that occur in a population which allow an organism to be advantageous in it's surrounding environment. Organisms change continuously over time due to random mutations; however, the aforementioned definition incorporates that these changes - the evolution of a certain organism, must be beneficial in terms of it's environment.
Evolutionary changes in metabolism, development and behaviour created three main kingdoms[2]:
- Bacteria
- Archaea
- Eukarya
Bacteria
Bacteria are prokaryotes, this means that it has no nucleus.
Archaea
Eukarya
LUCA
LUCA is the last universal common ancestor.[3]
References
- ↑ http://oxforddictionaries.com/definition/evolution
- ↑ Hartl, D.L. and Ruvolo, M. (2011) 'Genetics: Analysis of Genes and Genomes.' 8th edn. Burlington: Jones &amp; Bartlett Learning.
- ↑ Hartl, D.L. and Ruvolo, M. (2011) 'Genetics: Analysis of Genes and Genomes.' 8th edn. Burlington: Jones &amp;amp; Bartlett Learning.