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.
The frequency of competition according to the number of species involved.
Invasive species provide an example of predator pressure.
Gomphidae is an Odonata family that contains about 90 genera and 900 species. They are commonly refe
The Red-throated Bee-eater (Merops bullocki) is a species of bird in the Meropidae family.
Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing
Humans have evolved, beginning in Africa