The various Galpagos finch species
A) evolved in South America and flew to the Galpagos Islands.
B) evolved from a single ancestral species that flew to the Galpagos Islands.
C) all feed on the same diet in the Galpagos Islands.
D) are primarily different because of variations in the structure of their feet.
Question 2
Many of the 1.3 billion people who lack electricity live in rural regions where
A) nuclear energy is most useful.
B) hydroelectric energy is the best energy resource.
C) hydrogen fuel cells are most useful.
D) solar energy is most useful.
These species are all at risk of extinction.
Beautiful white Lion in Easter Cape, South Africa
Vesalius’s De Humani Corporis Fabrica was an important early work on the human species.
The Graying of America: Americans Age 65 and Older
Four kinds of evidence supporting the theory that species evolve.
Population Growth in America