In the arctic ocean, there are very few large aquatic plants. which of the following best explains why? (2 points)
a sea ice decreases the salinity of the water to a level not suitable for plants.
b plants have a difficult time surviving due to long periods of darkness.
c plants are unable to attach to the deep sea floor.
d currents are too strong for plants to survive.

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

What are the proteins in connectivity tissues of your foot examples of?

What changes the stability of the element