Darwin drew on multiple lines of scientific evidence to supp…

Darwin drew on multiple lines of scientific evidence to support his theory of evolution by natural selection in On the Origin of Species. From at least three different sub-disciplines of biology (such as paleontology, anatomy, embryology, or ecology), describe the types of evidence he used and explain how each one supports the theory. What are three examples of such evidence, and how does each contribute to the argument for evolution by natural selection?

A population of hummingbirds has a range of beak lengths. Af…

A population of hummingbirds has a range of beak lengths. After discovering a new food source—nectar deep inside long, trumpet-shaped flowers—hummingbirds with longer tongues begin to survive and reproduce more than others. Over time, most hummingbirds in the population have longer tongues. Which type of natural selection is most likely responsible for this change?