At present, the world population of humans grows by about ________ million per year.
A. 80
B. 0.8
C. 8
D. 800
E. 0.08
Answer: A
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The explosive eruption of Mount St. Helens in 1980 generated a large amount of pyroclastic
material. Indicate whether the statement is true or false.
Plants such as leafy spurge can double their population size every year in part because of their efficient production of large amounts of seeds. Populations that can double every year, such as leafy spurge, ________
A) exhibit exponential growth as they spread to new regions B) exhibit logistic growth C) will do so endlessly, eventually achieving a global distribution D) probably have more predators than other species
The biggest problem with invasive species is that in the new location, they ____.
A. are always bigger than native species B. have no population controls such as predators C. are always stronger than native species D. have higher reproductive rates than native species E. evolve more quickly than native species
The genetic code is associated with which of the following processes?
A) DNA replication B) translation C) transcription D) all of these