Biology, 06.03.2020 08:56 friendsalwaysbae
You find the frozen remains of a woolly mammoth in an Alaskan glacier. You analyze a bit of the tusk and find that its 14C:12C ratio is about one-fourth (25%) of the baseline level typically found in living organisms. Given that the half-life of 14C is 5,730 years, when did the mammoth die?
Answers: 3
Biology, 21.06.2019 18:30
What type of cell is produced after fertilization occurs and the gametes combines ?
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 22:30
What did you notice about the onion root tip cells that you saw at 40x power?
Answers: 2
You find the frozen remains of a woolly mammoth in an Alaskan glacier. You analyze a bit of the tusk...
Chemistry, 18.11.2020 21:10
History, 18.11.2020 21:10
Mathematics, 18.11.2020 21:10
Chemistry, 18.11.2020 21:10
English, 18.11.2020 21:10
Mathematics, 18.11.2020 21:10
Mathematics, 18.11.2020 21:10
Mathematics, 18.11.2020 21:10