Joined: Dec. 2002
Sorry for the intrusion, and for pushing my own favorite "icon", but what the hey...
|Cite one piece, just one piece, of empirical data that links the changes in allele frequency that occurs under selection and the appearance of new structures, processes or adaptations.|
They're not microglial cells (which, IMO, would not pass muster as a new structure, process, or adaptation in cewagner's eyes... but that's another discussion), but this icon fits the bill pretty nicely. The thread is a bit dated, as there is more recent research dealing with the interesting genes, but it still suffices to lay to rest this particular canard.
Again, admittedly not microglial cells, and thus probably out of place. But posted for the record nonetheless.
Edited by Art on April 21 2005,09:46