Explaining the origins and maintenance of cooperation in nature is a key challenge in evolutionary biology. A recent study demonstrates two novel mechanisms through which the natural ecology of sinking ocean aggregates--colloquially called 'marine snow' - promotes cooperation.
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http://dx.doi.org/10.1016/j.cub.2013.11.023 | DOI Listing |
Curr Biol
January 2014
Department of Physics, MIT Center for Physics of Living Systems, Computational and Systems Biology Graduate Program, Microbiology Graduate Program, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Bldg. 13-2008, Cambridge, MA 02139, USA. Electronic address:
J Geophys Res
March 1995
Center for Mars Exploration, NASA Ames Research Center, Moffett Field, California, USA.
The transection and superposition relationships among channels, chaos, surface materials units, and other features in the circum-Chryse region of Mars were used to evaluate relative age relationships and evolution of flood events. Channels and chaos in contact (with one another) were treated as single discrete flood-carved systems. Some outflow channel systems form networks and are inferred to have been created by multiple flood events.
View Article and Find Full Text PDFEvolution
July 1989
Faculdade de Medicina de Ribeirão Preto, Departamento de Genética, Av. Bandeirantes, 3900, 14049-Ribeirão Preto-SP, BRAZIL.
To study the degree of interpopulational differentiation and racial admixture in Africanized honeybees, we collected worker bees from three regions of Brazil (the northeast, the state of Sao Paulo, and Porto Alegre) and from Uruguay and determined their genotypes for 10 enzyme loci. We also performed a morphometric analysis on forewing measurements of worker bees from the northeast and Porto Alegre regions of Brazil and from Paysandu, Uruguay. Comparative analysis of interpopulational heterogeneity snowed that there are significant differences, especially at the Mdh locus, among the populations from different regions.
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