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.
Introduction. A black eye is bruising to the tissue under the skin surrounding your eye. It's usually caused by a blow to the face, such as a punch, or an accident such as a fall.
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.