Answers: 1
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
Answers: 3
Biology, 22.06.2019 04:00
Which chemical equation is unbalanced? which chemical equation is unbalanced
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Biology, 22.06.2019 05:00
Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.
Answers: 2
Biology, 22.06.2019 05:00
Cedric has a low fever and minor aches. yesterday, he went to the doctor for his booster shot and receive the flu shot. which best explains why he has this reaction?
Answers: 2
The primary care provider has prescribed a karyotype for a newborn. the mother questions what the ty...
Mathematics, 30.03.2021 05:00
Mathematics, 30.03.2021 05:00
Mathematics, 30.03.2021 05:00
Mathematics, 30.03.2021 05:00
Mathematics, 30.03.2021 05:00
Mathematics, 30.03.2021 05:00