how Dr. Schneider's observations with hummingbirds demonstrate the operation, in hummingbird populations, of each of the four components of natural selection listed in the video. In this video, Dr. Schneider points out that some of the hummingbird species in his study are 2 million to 3 million years old, which he notes makes them very young species?

Mike and his wife, amanda, are arguing about his in-laws. mike doesn’t want them to visit because they fight all the time when they come to the house and he is worried about the effect that their fighting is having on mike and amanda’s children. amanda finally yells out: “what about our fighting? ” mike replies, “well, that’s different. we fight because we’re having a disagreement, they fight because they hate each other! ” this is an example of