Biology, 07.10.2020 08:01 BlackAfro17
Gerald is studying the plants and animals of a meadow. He classifies the grasses and clover as
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Biology, 21.06.2019 20:00
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, 21.06.2019 21:30
Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?
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Biology, 22.06.2019 02:00
Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?
Answers: 3
Biology, 22.06.2019 02:30
Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels
Answers: 1
Gerald is studying the plants and animals of a meadow. He classifies the grasses and clover as...
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