The famous violins made by Antonio Stradavari in the late 1600s may owe their superior acoustical properties to the dense wood grown during a 70-year global ________.
A. warm spell called the Medieval Warm Period
B. cold spell called the Maunder Minimum
C. cold spell called the Stradavari Minimum
D. warm spell called the Primary Greenhouse Warming
Answer: B
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In 2017 President Donald Trump announced the United States would withdraw from the ________
A) United Nations B) UN's Framework Convention on Climate Change C) Montreal Protocol D) Paris Agreement E) Kyoto Protocol
A species of bird had an original range covering the entire eastern half of the United States from New England down to Florida, west to the Rocky Mountains. During a period of glaciation, the eastern part of the range was cut off from the western part
for 2000 years. Then the glaciers melted and the birds' original range was reestablished. During the separation, the western birds evolved a slightly different song and a darker wing color. Ornithologists are now studying this species to determine whether speciation has taken place. What evidence should they look for in their study? What will be an ideal response?
Individuals of a single species fighting over access to a limiting resource would be an example of ________
A) interspecific competition B) symbiosis C) resource partitioning D) intraspecific competition E) competitive exclusion
Which of the following is a major conflict over the use of federally owned land?
A. The kinds of uses that are excluded. B. The large amount of money the federal government earns from the land. C. The taxes people pay to manage the land. D. None of these is an issue.