Which of the letters best represents summer for the Northern Hemisphere?
A. A
B. B
C. C
D. D
Answer: C
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German geographer Friedrich Ratzel suggested that each nation needed Lebensraum, which means
A) geopolitics. B) room to live. C) survival of the fittest. D) the strong will survive at the expense of the weak.
One dependent variable in this study is ________
A) the age of the dogs B) the type of food the dogs receive C) the breed of the dogs D) how much the dogs grow
In the diagram below, B is the
A. hadal zone. B. epipelagic zone. C. benthic zone. D. mesopelagic zone.
Managing crop competitors and pests have been challenging to agronomists for centuries. One approach, integrated pest management, ________
A) uses no pesticides of any kind B) uses only pheromones C) combines a variety of pesticides to combat the pest D) uses only chemical pesticides E) combines chemical pesticides with biological control techniques