What is the significance of extremophile bacteria?
A. They may represent the earliest form of life on Earth.
B. They may account for the origin of the ozone layer.
C. They may account for the presence of water on Earth.
D. They may account for the presence of oxygen on Earth.
Answer: A
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Muddy shores are often poor in oxygen.
Answer the following statement true (T) or false (F)
The doctrine of _________ held that the major features of the surface of the earth were created by sudden, short-lived, violent events.
a. uniformitarianism b. gradualism c. metamorphism d. catastrophism e. evolution
Where does the majority of illegal marijuana production take place in North America?
A) Western Coasts of the United States and Canada B) Western Coast of the United States only C) Appalachian Mountains D) Rocky Mountains E) Great Plains
During the afternoon, the greatest temperature difference between the surface air and the air a meter or so above occurs on a ____ day
A) sunny, calm B) sunny, windy C) cloudy, calm D) cloudy, windy