In rainforest areas, young leaves appear to be red..shades of red. They are more nutritious 28 Sunday Sep 2014 Posted by ade sarroff in resource ≈ Leave a comment Tagscolour vision The reason proposed why monkeys, apes, humans were favoured by natural selection with three opsins for colour. (All other mammals have two opsins) Share this:TwitterFacebookLike Loading... Related