Biodiversity hotspots are ____.
A. tropical areas where extinction is occurring
B. islands where extinction is occurring
C. areas that are highly endangered centers of biodiversity
D. large areas with a variety of thriving species
E. ecosystems that are resistant to climate change
Answer: C
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A. Hokkaido B. Tokaido megalopolis C. Nagasaki D. Akita
Fractional distillation is used in processing ________
A) ethanol fuel B) coal C) natural gas D) crude oil
The ________ includes most of geologic time (87%).
A. Paleozoic Era B. Mesozoic Era C. Quaternary Period D. Cenozoic Era E. Precambrian
If you live at high latitude, when do you expect to see the aurora?
A) at times of high sunspot activity, during the active sun B) during low sun spot activity, when solar flares are most abundant C) at intermediate periods when sunspots are present but not prominent D) at times when the earth's magnetic field has temporarily been weakened