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Kin selection in Amoebae

There has obviously been a strong selective pressure on protist cells to keep together for their mutual advantage that lead ultimately to the evolution of metazoans.  The slime moulds, famously exemplified by Dictyostelium discoideum are a half way house, most often living as distinct individual amoeba but occasionally coming together for sexual purposes and to disperse the progeny.  The formation of the Dictyostelium amoebae to produce the fruiting body does involve the death of a significant proportion of these amoeba so this could be looked upon as kin selection for the greater good of the species.  Is there any such indication of kin selection in amoebae?  The answer is equivacal! in some species canabolism is regularly observed, a distinctly non-kin selecting activity, yet in others there is evidence for apoptosis.  This is strong evidence for kin selection as it is difficult to imagine why an amoebae that essentially does its own thing would evolve the dangerous ability to kill itself if this mechanism was not for the good of the whole species. (see amoeba and apoptosis). 

 
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