- Jan 29, 2017
- 12,920
- 13,372
- Country
- Canada
- Faith
- Agnostic
- Marital Status
- Private
But what scientist know about evolution that i am missing in this subject, in the topic we were talking about about building from scratch, so for example the eye, they say it started by 'getting' an light sensitive cell, now how exactly this animals are 'getting' this things, did the animal got light sensitive cell in every part of the body, until someday it settled in the correct place?
Light sensitivity likely began with the evolution of opsins (photoreceptor molecules). You can read about their evolution here: Evolution of opsins and phototransduction
Even this first step in getting a light sensitive cell, is from scratch, you understand? this little step had no earlier step, so it has to be done from scratch....
The evolution of opsins wasn't from scratch. Their evolution appears to have originated from pre-existing proteins.
See: Metazoan opsin evolution reveals a simple route to animal vision
Upvote
0