How does natural selection relate to evolution?
a. Populations evolve due to natural selection. b. Speciation causes natural selection. c. Natural selection is a direct consequence of evolution. d. Natural selection occurs due to common descent. 8. T/F: The theory of common descent states that species have changed over time, but are NOT related to one another. 9. Which of the following did NOT help Darwin develop his own understanding of evolution in the 1800s? a. The ideas of other evolutionists b. Discoveries of fossils c. Geological ideas that the earth was very old d. Knowledge of the process of HIV transmission. 10. T/F: 2 species that share many DNA sequences in common are probably more closely related than 2 species that have few DNA sequences in common. 11. T/F: According to the diagram below, gorillas are more closely related to humans than they are to orangutans. (Hint: think about most recent common ancestor) 12. If an element has a half-life of twenty million years, and there is 25% of it remaining in a rock, how old is
