Will give brainliest to correct answer and explain your reasoning im a scientist uses radioactive dating to determine the age of a fossil and discovers that a hominid species may have existed much earlier in history than he thought. which of the following would most likely increase the reliability of this finding? a. using radioactive dating to determine the age of similarly shaped fossils b. repeated analyses of the fossil finding it to be the same age each time c. using radioactive dating to find the age of fossils found in the same geographic location d. publication of his findings in different paleontology magazines

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

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

The open ocean of any depth is called the