Why did coal not form in Australia, while it did form on other continents
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A. Australia had not yet formed as a continent.
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B. A meteorite impact prevented coal formation in Australia.
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C. Australia had too much plant life for coal to form.
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D. Coal formed on Earth when Australia was near the south pole

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.