When considering the evolution of the eye, of the following features, which was likely the first to evolve?

A flat layer of photoreceptors.

When considering the evolution of the eye, of the following features, which was likely the first to evolve?

thinking about the evolution of complex structures like the eye, and what we said is that things like that can evolve in a stepwise fashion if we just put the right steps together in the right order. So what probably evolved first for the eye? Well, we said option c here, a flat layer of photoreceptors. That's that's my answer. It's getting my green checkaroo. Alright. So a flat layer of photoreceptors allows an organism to tell light from dark. That's a huge advantage to organisms that can't tell that at all. Alright. Now other options here, a simple lens. A lens is gonna allow light to be focused, but it doesn't help the focus lens unless you have something to focus it onto till you have some layer of photoreceptors. So that's not gonna happen first. We have a cup like shape. Well, that cup like shape help that layer of photoreceptors tell direction of light. But again, you need those photoreceptors before being on a cup like shape helps anything, so it's not going to be that one. And then finally, we have d and enclosed spheroid organ. Again, that sort of eyeball that's gonna come down the line, so it doesn't help to have a enclosed spheroid organ unless you have photoreceptors in there. That's what's evolving. 1st, option c, a flat layer of photoreceptors. There we go.