Evolution is quicker than they thought

[xoxoxoBruce]

Originally Posted by Happy Monkey

Right, the species was modified in response to the threat, when the individual bugs who by random chance best handled the new food bred more. The individual flies didn't modify their genes to metabolize the new food better.

OK, I follow you. But the groups did change and diverge in response to outside stimuli. There must be an awful lot of fruit flies out there that can't get laid.... they're lucky then don't live long.