12-12-2009, 10:32 PM
It's been somewhat of a paradox of nature how simple organisms without nervous systems accomplish what seems to be intelligent behaviors. Specifically, I'm thinking about single celled organisms with flagella seems to be capable of "hunting". One would think you would need some organizational mechanism for that type of behavior (e.g. a central nervous system). But, even the behavior of planaria and other worms seems far more organized than you might think given their simple nervous systems.