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.
Treatment of a Black Eye â How Long It Takes To Heal. If you have sustained an injury that has caused a black eye, the first thing you should do is put an ice pack on it; this will help to minimize the pain and swelling.If an ice pack cannot be found, a bag of frozen peas will do. black eye can sometimes take as long as two weeks to heal completely, and a severe black eye can take even longer.