From unicellularity to multicellularity - molecular speculations about early animal evolution
Genet. mol. res. (Online)
;
7(1): 50-59, Jan. 2008.
Article
in English
| LILACS
| ID: lil-553770
ABSTRACT
A morphological, physiological, developmental, and genetic organization of great complexity ineluctably unfolded from relatively simple phenomena invested with enormous potential. Sometime long ago in the Protererozoic times, parasitic invasions caused lower evolutionary levels to integrate into higher-level selection. Therefore, we have a multi-level selection problem that ultimately revolves around the question of how natural selection among lower-level units acts to create higher-level units of selection, in which Darwinian competition among replicators ceases to be the foremost force. The first level relinquishes its independence for the benefit of a higher-level cooperative force that is now the criterion of fitness for the new transition in the evolutionary process.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Selection, Genetic
/
Biological Evolution
/
Models, Genetic
/
Models, Theoretical
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Genet. mol. res. (Online)
Journal subject:
Molecular Biology
/
Genetics
Year:
2008
Type:
Article
Affiliation country:
Colombia
Institution/Affiliation country:
Instituto de Genética Evolutiva y Biología Molecular/CO
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