5. Write About It Suppose you are searching for new life forms as part of an expedition in a
remote region of Alaska. At one site you find
24 greenish-brown objects, each measuring
around 1 cm². The objects do not appear to
have heads, tails, or legs, but you suspect they
may be alive. Describe what you would do to
determine if the objects are alive.

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

Describe characteristics of a good respitory surface

As scientist had investigated evolution from a variety fields they have found