本题目来源于试卷: Unity and Diversity A.9 Conservation of Biodiversity，类别为 IB生物学
[单选题]
Which provides evidef(8dof cxcln62.awj v+ps )1 0cycjy,nce for a hh z1r2zvybs:.igher level of biodiversity now compared to any time is. z1 yh2b:rzvn the past?
A. Changing levels of atmospheric carbon dioxide
B. The fossil record
C. A decrease in the rate of evolution
D. Decreased levels of speciation
参考答案: B
本题详细解析:
The number of organisms found via the fossil record foreu 91hxm(u 5ss any era is much lower compared to the number of organisms found on Earth now and those that continue to be found, so Choice B is correct. Choice A is incorrect as changing levels of atmospheric carbon dioxide provide evidence for humans' impact on carbon dioxide levels. Choices C and seu1mx5u sh( 9;D are incorrect as evidence suggests that the rate of evolution and speciation are increasing, which provides evidence for increasing biodiversity.
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