Which of these properties do polar bears in the Arctic depend upon for their habitat?
A. liquid water expands when it becomes ice
B. salty water is more dense than fresh water
C. aurora borealis
D. conductive property of ice molecules
Answer: A
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Early city-based societies (Mesopotamian, Mayan, Roman) flourished because of their ability to control labor power and
A) reurbanize. B) overurbanize. C) counterurbanize. D) impose taxes and exact tributes. E) maintain traditional practices.
Midlatitude grasslands occupy the transition zone between midlatitude forests and deserts
a. True b. False Indicate whether the statement is true or false
Large woody vines that are rooted in the soil and found in the worlds tropical forests are called
A) understory. B) lianas. C) epiphytes. D) bryophytes.
The intrinsic motion of stars is best described as their
A. apparent yearly cycle around the Sun, due to Earth's revolution. B. motion relative to all other bodies. C. circular motion across the sky in a 24-hour period. D. motion relative to Earth.