Growing rice results in the release of ________ into the atmosphere
A) methane
B) sulfur oxides
C) nitrous oxide
D) ozone
E) sulfate aerosols
Answer: A
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Among the world's primary food security concerns is that the world's growing urban areas continue to be entirely dependent on the world's shrinking rural areas for food
Indicate whether this statement is true or false
Primary (P) waves have all of the following characteristics except
A) arrives first at seismic stations. B) body wave. C) causes alternating squeezing and stretching of the material as the wave passes. D) can't pass through gases and liquids.
Which of the following scenarios best describes a density-dependent factor limiting population growth?
A) A particularly dry summer shrinks and dries up many ponds in central Canada, causing increased aggression and competition for limited nest sites among female common goldeneyes (ducks). B) A particularly snowy winter makes it difficult for female deer to find food, thus affecting their ability to reproduce. C) A tropical storm strikes one of the Hawaiian Islands and wipes out a population of nénés that had been recovering from near-extinction. D) An April blizzard kills off many migrating barn swallows, which could not tolerate the cold and snow. E) A homeowner sprays her lawn with broadleaf herbicide to kill the dandelions that have started growing there that spring.
A collection of separate populations that interact with each other is called a metapopulation.
Answer the following statement true (T) or false (F)