Which type of human activity negatively affects deserts, grasslands, forests, and mountains?
A. off-road vehicles
B. agriculture
C. conversion to cropland
D. depletion of groundwater
E. timber extraction
Answer: A
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Scientists have been able to accurately forecast earthquakes for approximately a decade
Indicate whether the statement is true or false
One difference between prokaryotic and eukaryotic cells is that
A. the DNA of prokaryotic cells is found in linear chromosomes, whereas the DNA of eukaryotic cells is found in a single circular chromosome. B. eukaryotic cells are generally smaller than prokaryotic cells. C. prokaryotic cells have a nucleus, whereas eukaryotic cells do not. D. prokaryotic cells have existed on Earth far longer than eukaryotic cells.
Bipedalism of early hominids probably developed as a response to changing climatic conditions
that resulted in changes from forest to savanna. Indicate whether the statement is true or false.
The Himalayas are no longer tectonically active
a. True b. False