It is now clear that desertification is ________
A) natural
B) human-caused
C) related to the enhanced greenhouse effect
D) caused by a mix of natural and human circumstances
E) intensified by the planting of shrubs and trees
Answer: D
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The first major transgression onto the North American continent is recorded in rocks of the
____________________ sequence. Fill in the blank(s) with the appropriate word(s).
Slopes can change through time, and a minimum angle is required for mass movement to occur.
a. true b. false
The Gobi Desert is noted for its widespread rice production
Indicate whether the statement is true or false
Characteristic fauna of what biome include large ungulates (hooved mammals), such as giraffe, zebra, buffalo, gazelle, wildebeest, antelope, and rhinoceros?
A) Boreal and montane forest B) midlatitude broadleaf and mixed forest C) midlatitude grassland D) tropical rain forest E) tropical savanna