Each of these is an example of climate change leading to desertification except
a) higher temperatures on a global scale lead to higher levels of evaporation and less moisture in soils.

b) higher evaporation can lead to soil salinity levels increasing in certain areas of the globe.

c) more frequent droughts in southern europe and other areas will reduce the soil content. eliminate

d) increased temperatures will decrease the growth of plants on a global scale.

Which property is characterized by the ability to bend? a lustrous b conductive c malleable d opaque

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 the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?