Question 3
(Multiple Choice)
The diagram is reminiscent of Darwin's sketch showing the branching of evolution. The horizontal axis of the diagram is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. 
Which combination of ideas is represented in the diagram?
A) extinction and mutation
B) origin of new species and mutation
C) natural selection and overreproduction
D) origin of new species and extinction
Answer
D