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 evidence f- q;omm:7pmuy ej*vak xzq//7or a higher levle v7mbhn.gj -1ad v1 i-8v.ozel of biodiversity now compared to any timehv 8-1 jievgd-b7zl1.omv a n. in 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 for any era is much low)6w (ayzb3x pwuc2n c3er compared to the number of organisms found on Earth now)uxba2wcpz( w33 nyc6 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 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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