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1、河南省2023-2024学年度七年级期末
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5、河南省2023-2024学年度七年级期中检测卷
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and conservation actions had done,” says Moises Alonso, an evolutionary geneticistwho authored a preprint last year indicating that protecting existing habitat won't beenough to prevent genetic diversity losses for many species.“We needed somethinglike this," he says.Conservation scientists emphasize the importance of continuing to monitorpopulations. But DNA methods aren’t always practical, some note.“It is relativelyTo get around that,Mastretta-Yanes and others published a paper in EcologyLetters last year that used proxy(代替物)measures,such as population size,to evaluategenetic diversity in 919 species. The method, which only required about 3 hours ofwork per species, indicated that 58% of the species have populations that are too smallto maintain their genetic diversity.The fact that these different approaches found“Finally, genetic diversity is getting the attention it deserves."31 What is Paragraph 3 mainly about?A. Challenges of collecting DNA data for diversity research.C.Research methods applied to track genetic diversity changes.D. Impacts of human disturbances on diversity of different species32. What can be learned from Grueber's study?A. Habitat extension and population management preserve diversity.B. The diversity of common species tends to decline more severely.C. At-risk species better resist the impact of environmental changes.D. Ecosystem recovery and pest control drive population rise.33.Mastretta-Yanes holds that DNA methodsA. will soon be replaced by proxy measuresB.lackpracticalitydue to theircosts andcomplexityC. may get in the way of monitoring species populationsD. require a large population size to achieve high accuracy西城区高三统一测试试卷英语2025.4第10页（共14页）