Answers: 3
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 03:30
If assuming tasting ptc as a simple gene trait,what other genotype would you select to put in this missing genotype box that could result in this phenotype
Answers: 3
Biology, 22.06.2019 19:10
Which statement does lola need to correct, and why? a) statement 1 because spiral galaxies do not havearmsb) statement 2 because the bulges contain mostlyyoung red stars.c) statement 3 because the arms are made of mostlyyoung blue and blue-white stars.d) statement 4 because spirals galaxies contain littleto no dust.(c)
Answers: 1
How the total mass of carbon is affected as it is cycled through various Earth spheres?...
English, 07.12.2021 05:40
Arts, 07.12.2021 05:40
History, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Spanish, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Biology, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
English, 07.12.2021 05:40
Health, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40
Mathematics, 07.12.2021 05:40