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To: Jill who wrote (188911)	3/6/2009 12:34:54 PM
From: neolib	Read Replies (1) \| Respond to of 306849

They didn't give it to her for mitochondria as organelles. The widespread acceptance of that is sufficiently recent that I still think she is a contender. TWT. Also symbiosis--it isn't exactly that the parasites are smart, pure and simple, and help us out. Correct for many cases. But it is a mistake to assume that dynamic is also true of altruism of individual interactions in social species, or even across species. Consider domestic cats and dogs for example. Their evolutionary history in recent times is dominated by social interaction with our species largely for companionship. Not a typical historical evolutionary trans-species interaction, The insect world also has many examples of trans-species symbiosis which are much different than the examples you list. More akin to humans and dairy cattle. Ants & aphids for example.