SIU SOM Logo. Microtome for cutting ultrathin tissue sections.
33
SIU SOM Logo
-
Upload
estella-williams -
Category
Documents
-
view
219 -
download
0
Transcript of SIU SOM Logo. Microtome for cutting ultrathin tissue sections.
Fly species differ in their distributions of nerve-fiber diameter.
Tipulidae, Tipula bicornis Forbes Lauxaniidae, Minettia magna (Coquillett)
Tabanidae, Tabanus calens Linnaeus Syrphidae, Helophilus fasciatus Walker
Bombyliidae, Sparnopolius sp. Bombyliidae, Poecilanthrax sp.
Charles Darwin Letter to T.H. Huxley 1859
One point which has greatly troubled me; . . . what the devil determines each particular variation? What makes a tuft of feathers come on a cocks head, or moss on a moss rose?