Historically, the earth’s ocean had a ph of 8.2. in recent years, it has dropped to 8.1. how might this change affect the ocean environment? a. the skeletons of coral will become soft due to increased acidity. b. the rise in alkalinity will make the ocean unfit for certain ocean plants. c. at 8.1, the ocean has reached neutral ph, making it identical to pure water. d. the ocean’s co2 content will decrease, improving the environment for animals.

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

Yeast cells reproduce quickly by budding. this is a form of reproduction so all the yeast cells a) sexual; vary b) asexual; vary c) asexual; are identical d) sexual; differ from the parents submit hint structures and functions of cells cellular reproduction

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give