The elimination of a large proportion of species on Earth is called a(n) ________
Fill in the blank(s) with correct word
mass extinction
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After it starts being used in a nuclear reactor, how long can nuclear fuel be used before it is depleted and becomes high-level nuclear waste that must be stored safely for 10,000 years?
A. 3-4 years B. 30-40 years C. 300-400 years D. 3-4 days
Briefly discuss how the Internet and popular music have encroached into Russian culture since the late 1990s. Have these changes been received equally well by all of the Russian people? If not, who is more resistant to change, and why?
What will be an ideal response?
Which of the following is not a trace element in living organisms?
A) Iron B) Copper C) Zinc D) Carbon
Explain how the historical influence from mainland Asia left its mark on Japan
What will be an ideal response?