Biology, 08.12.2020 05:30 datboyjulio21
Fossil fuels are formed naturally beneath the surface of the earth. humans use fossil fuels as energy sources. which choice is NOT a fossil fuel?
A) oil
B) coal
C) natural gas
D) uranium ore
Answers: 2
Biology, 21.06.2019 20:00, u8p4
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 08:00, animexcartoons209
Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.
Answers: 1
Biology, 22.06.2019 08:20, AgarioEdit
The table lists the observations students made about four specimens under a microscope. based on these observations, what specimens did the students examine? animal plant virus prokaryote cell membrane present ribosomes present lysosomes present nuclear membrane present cell wall present ribosomes present nuclear membrane absent cell wall present ribosomes present nucleus present large vacuole present reproduces inside of a cell nucleus absent rna present 2019 edmentum all rights reserved intl
Answers: 2
Biology, 22.06.2019 15:30, perezsamantha3oqr0za
The image shows a group of fish. the type of social behavior shown in the image is called
Answers: 2
Fossil fuels are formed naturally beneath the surface of the earth. humans use fossil fuels as energ...
Social Studies, 23.03.2020 17:53
Mathematics, 23.03.2020 17:53