This diagram shows a mutation in part of a gene. Which of the following statements best describes what has occurred? A. A mutation has occurred on the template strand of DNA, but it did not affect the mRNA strand that was transcribed
B. A mutation has occurred on the mRNA strand, which affected the DNA strand that was being replicated
C. The codon on the mRNA strand codes for the same amino acid, so the same protein is produced
D. The codon on the mRNA strand codes for a different amino acid, so a different protein is made

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

Does the sun release radiant energy?

Modern whales developed their traits through natural selection what occurs during the process of natural selection