Smidlee on 24 July 2010
| Rath said:
Euglena, simple photo-receptors (step 1 in diagram)
Planarian, cup shaped eyes (step 2)
Nautilus, pinhole eyes (step 3) etc. etc.
Wikipedia is great =P Edit: Also your argument on 'the more the photo-reciptor is pointing towards the light' doesn't work. A photon arriving at a photoreceptor causes the same signal no matter what angle it arrives at. That's the reason for the evolution of the 'pinhole' eye which allows direction to be known. |
.jpg/200px-Nautilus_pompilius_(head).jpg)
These are all modern creatures with modern eyes.According to ToE Human didn't evolve from modern apes nor did modern eyes evolve from modern eyes. The article I read was about a sea creatures which had these simple photoreceptors yet knew the direction of the light and swim toward it.
