I know this photo is going to get comments about being a leaf and a macro in the science challenge but the real truth is photosynthesis part of the science of plants. For anyone who said this didn't meet the challenge take a look at this.
//www.sciencemadesimple.com/leaves.html
Statistics
Place: 130 out of 172 Avg (all users): 4.7739 Avg (commenters): 6.1667 Avg (participants): 4.4731 Avg (non-participants): 4.9781 Views since voting: 994 Votes: 230 Comments: 7 Favorites: 0
Compositionally, I think the white veins of the shot add interest and serve to move the eyes down and through the shot. I like how they are place just off-center and meet at the point near the top.
Concerning technique, I think a sharper focus would have really made this shot. The white "pops", which is good, but the other colors end up looking kind of muddled. If you were hand holding it, you probably need a higher ISO or faster shutter speed. If you were using a tripod, perhaps the blur is from pushing the button while you were taking. A remote control (if available) or delayed timer on the shutter can help.
It made perfectly good sense to me about how it met the challenge.
I like all the shades, and the little hole to the bottom left - makes the picture more "human" (if that makes any sense :) It does look like it's a bit blurry. ~5