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Jussie's Avatar Jump to comment 21 by Jussie

Comment 20 by DavidMcC

Maybe, but for surface life, eyes are a "must have", unless you live in a very dark cave. This is because imaging eyes can evolve if there is light to see, so inevitably, they do evolve, sooner or later - usually sooner, once you have multicellularity.

I think we are in total agreeance:

Comment 19 by Jussie If there is an advantage to be had by sensing light. 'Eyes', or other light sensing methods, will evolve.

And

(Even one single-celled species has organelles that appear to produce some sort of vision, AFAIK.)

Interesting. And by the way, seeing as you seem to a thing or two about biology. How the plants know where the sun is? Do they feel the heat or do they sense the light?

Mon, 03 Oct 2011 11:50:12 UTC | #877356