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.
Full Answer. A mild bruise around the eye may disappear within three to five days. To treat a black eye, apply ice to the area immediately, every 15 minutes for a 24-hour period. Apply ice to the affected area for the first several days, and elevate the head while sleeping until swelling subsides.