Which section of a stream is characterized by the absence of fish and found downstream from the release of oxygen-demanding wastes and heat?
A. clean zone
B. decomposition zone
C. septic zone
D. recovery zone
E. dead zone
Answer: C
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Sea otters play a role in maintaining the biodiversity of which ecosystem?
a. Tidepools b. coastal kelp forests c. coastal sandy beaches d. open ocean areas e. Estuaries
Which of the following is a factor that causes seasons to occur?
A. the length of the daylight hours B. the changing shape of Earth's orbit around the sun C. the changing distance between the Earth and the sun D. the constant angle at which sunlight reaches the Earth
The Permian extinction may have been caused by the interrelated consequences of the
consolidation of Pangaea and global climate change. Indicate whether the statement is true or false.
Earthquakes, the emergence of new landforms, and other geologic events occur in places where sections of Earth's crust are in contact with each other, also known as plate boundaries
a. True b. False Indicate whether the statement is true or false