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.
Extinction and immigration of bird species on the California Channel Islands between 1917 and 1968 (
The Eastern Banjo Frog is a common frog species across eastern Australia.
A day-flying Hummingbird Hawkmoth drinking nectar from a species of Dianthus
Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species.
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
North America’s Untapped Fossil Fuels