2. As part of his theory about evolution, Darwin suggested that natural selection could occur without causing evolution. Using your knowledge of natural selection explain how this could occur.
3. The images in Fig. 11 are both of a horseshoe crab. The fossil is about 200 million years old and the x-ray is of a modern day horseshoe crab. (a) Does this evidence support the hypothesis that the horseshoe crab has evolved very little during the last 200 million years? (b) Do these images support the hypothesis that natural selection can occur without evolution occurring?
Fig 11 A fossil and a modern-day x-ray of a horseshoe crab.
4. The drawing in Fig. 12 is sometimes used to represent the evolution of modern day humans. What do you think this drawing suggests about the evolution of humans? Do you think this drawing fits in with Darwin’s ideas about the tree of life? Explain your answer.
Fig. 12 5. Do you think that humans are still evolving? Give reasons for your answer.
