Hear the different songs of three lacewing flies in this interactive activity. These songs are an example of a reproductive barrier that can lead to speciation; the differences among the songs determine mate choice and result in reproductive isolation between the different populations.Also included is a table summarizing the different kinds of isolating mechanisms.ear the different songs of three lacewing flies in this interactive activity. These songs are an example of a reproductive barrier that can lead to speciation; the differences among the songs determine mate choice and result in reproductive isolation between the different populations.
Sometimes, a black eye can occur after cosmetic surgery to the face, such as a facelift or a nose operation. The area around the eye turns bluish or purple because tiny blood vessels under the skin burst and blood leaks out into surrounding soft tissue.
The Mythbusters crew went with the assumption that eye black actually reduces glare by absorbing more reflected light than skin. And they showed that when a player is wearing a hat, the eye black does actually reduce glare by the slightest amounts.he idea that eye black would reflect less light than skin is an interesting assumption, but Iâm not actually sure that is the goal of eye black. I always thought eye black was used to keep sweat from accumulating under your eyes. Evidently, someone on the Discovery Channel forums agreed with me.