A species of lizard can range in color from very light brown to very dark brown. It lives in a forest hiding among the dead leaves. One year, a fungus starts to grow over the dead leaves, creating a very powdery white coating. The light colored lizards can now blend in much better with the leaves than the dark lizards. _ What is the middle trait?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.