Any habitat surrounded by a different one can be viewed as a(n) ____________________
Fill in the blanks with correct word
habitat island
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An example of artificial selection is the
A) breeding of corn from teosinte. B) observation that some snakes retain tiny, incomplete hind legs. C) evolution of antibiotic-resistant bacteria. D) fact that all mammalian limbs are made up of the same set of bones.
Geography is considered to be
A) a natural science. B) a social science. C) both a natural and social science. D) neither a natural nor a social science.
The best geologic data currently available indicates that Earth is approximately ________ years old.
A. 4,550 B. 4,550,000 C. 4,550,000,000 D. 4,550,000,000,000 E. 4,550,000,000,000,000
The most populous ethnic group in the United States is
A) African Americans. B) Asian Americans. C) Latinos/Hispanics. D) American Indians and Alaska Natives. E) Austral-Asians.