The current world population is approximately
A. 1.5 billion.
B. 4.2 billion.
C. 7.1 billion.
D. 10.1 billion.
E. 15.8 billion.
Answer: C
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Which of the following is an accurate statement about the eyewall of a hurricane?
A. It contains strong thunderstorms. B. It forms after the hurricane has made landfall. C. It makes up the inner portion of the eye. D. It is located on the outside of spiral rain bands.
The primary language family found in most of Mexico, the U.S. and Southern Canada is
A) Dravidian B) Altaic C) Indo-European D) Khoisan E) Austronesian
The Earth's magnetic field has reversed itself many times in the geologic past. Indicate whether the statement is true or false
These deep-sea holothurians (sea cucumbers) and brittlestars obtain food by
1.eating prey that swim past.
2.eating mud and digesting the bacteria and organic matter in it.
3.migrating vertically to the euphotic zone each night.
4.autotrophic means – they photosynthesize.