Which of the following best explains why urbanization has led to larger and more frequent floods?
A. rainwater tends follow roadways and becomes more concentrated
B. heat island effect of cities produces more frequent rains
C. rainfall volume is naturally higher over areas where vegetation is more sparse
D. large areas of land are covered with impermeable surfaces
E. irrigation of yards and landscaping
Answer: D
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Which of the following would produce a frameshift mutation?
A) the insertion of a single nucleotide in a gene B) the deletion of a single nucleotide in a gene C) the replacement of one nucleotide with another in a gene D) both A and B
What theory explains the formation of a differentiated Earth consisting of layers?
A)Darwin's theory B)plate tectonic theory C)Einstein's Theory of Relativity D)homogeneous accretion theory E)Big Bang
About what percentage of Earth's land surface is covered by deserts?
A) 3% B) 15% C) 30% D) 55%
Acetylation of histones occurs at which residues of the protein?
A) cysteine B) histidine C) lysine D) phenylalanine