What Were Charles Darwin's Two Fundamental Insights About the Process

Multiple Choice

What were Charles Darwin's two fundamental insights about the process of evolution?

A) The environment selects on variation in the traits of individual organisms, and all species have descended from one or a few common ancestors.
B) All species have descended from one or a few common ancestors, and populations, not individuals, evolve over time.
C) The environment selects on variation in the traits of individual organisms, and organisms are in a constant struggle for existence.
D) Populations, not individuals, evolve over time, and evolutionary change is connected to environmental fit.