Biology, 14.02.2020 23:46 katepotter2019
Name the three main biomes of the United States (land only).
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 07:00
According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously
Answers: 2
Biology, 22.06.2019 15:00
Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.
Answers: 1
Name the three main biomes of the United States (land only)....
English, 12.11.2020 07:50
Chemistry, 12.11.2020 07:50
History, 12.11.2020 07:50
Physics, 12.11.2020 07:50
Mathematics, 12.11.2020 07:50
Mathematics, 12.11.2020 07:50
Advanced Placement (AP), 12.11.2020 07:50
Mathematics, 12.11.2020 08:00
History, 12.11.2020 08:00
Biology, 12.11.2020 08:00