Question 1

The vertebral column is represented by the letter ____.
Question 2
After his return to England, Darwin pondered which of the following questions most heavily?
◦ What could explain the great numbers and variety of species?
◦ Does the fossil evidence support uniformitarianism?
◦ Are the extinct and living armadillos the same species?
◦ Did Galápagos mockinbirds have a common mainland ancestor?
◦ Will natural selection work in England?