Deep aquifers can be nonrenewable on a human timescale.
Answer the following statement true (T) or false (F)
True
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Dark energy bends the curvature of spacetime
A) in the exact same fashion as gravity. B) in the opposite manner of gravity. C) by absorbing all lightwaves that pass through it. D) Dark energy does not bend the curvature of spacetime.
Which of the following about Bt crops is true?
A) They are GM plants that incorporate the gene for producing a potent bacterially produced insecticide. B) They produce chemicals that interfere with the molting of insect pests. C) They should always be planted in pure stands to reduce the chance of Bt resistant pests. D) They produce chemicals that are similar to insect pheromones, interrupting pest mating cycles.
Most plant productivity in a forest is directly related to the
A) intensity of sunlight reaching the forest floor. B) unvarying temperatures throughout the year. C) consistent precipitation in every month of the year. D) quality of topsoil in the forest.
What was the primary reason that other scientists did not accept the continental drift hypothesis?
A. Wegener did not have enough evidence. B. They didn't know about the hypothesis because Wegener was too poor to publish. C. Evidence for the alternative hypothesis of land bridges was much stronger. D. Wegener's explanation for the driving mechanism was weak.