In agricultural areas, farmers pay close attention to the weather forecast. right before a predicted overnight freeze, farmers spray water on crops to protect the plants. use the properties of water to explain how this method works. be sure to mention why hydrogen bonds are responsible for this phenomenon.
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Biology, 21.06.2019 20:00, u8p4
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection
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Biology, 22.06.2019 00:00, Studyhard3332
Does masterbation affect height growth or loss of growth hormone?
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In agricultural areas, farmers pay close attention to the weather forecast. right before a predicted...
History, 21.10.2020 17:01
Health, 21.10.2020 17:01