What was the cause of the Dust Bowl of the 1930s?
A) drought
B) over-cultivation
C) wind erosion
D) all of these
E) none of these
Correct Answer:
Verified
Q2: Biogeography is defined as:
A) the study of
Q3: Phytogeography is:
A) the geography of plants
B) the
Q4: Although most species may not have been
Q5: Biodiversity refers to:
A) the total mass of
Q6: The largest pool of carbon in the
Q8: Which of these states was the most
Q9: Before the present, the most recent time
Q10: Recent trends show that as human population
Q11: About what percent of species have been
Q12: Adding iron-rich particles to the ocean is
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