Which statement best describes a human influence on the biogeochemical cycles? increased eutrophication caused by high levels of nitrogen and phosphorous
increased nitrates available due to inaccurate methods of denitrificationincreased global warming due to alternative energy sources
increased amount of water that is available to freshwater ecosystems

What is the best-known carbohydrate?

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Which of the following terms best matches this definition: the process where humans choose the traits that will be present in the next generation through breeding. question 4 options: genetic determinism artificial selection acquired selection natural selection