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Which of the following solutions can best reduce an anthropogenic cause of ocean acidification?

Which of the following is a human health impact associated with exposure to radon gas inside homes or other buildings?

Which of the following solutions can best reduce an anthropogenic cause of ocean acidification?

In England approximately 250 years ago, the peppered moth had light-colored wing patterns that camouflaged them against the light-colored trees. Over time in urban areas, the number of peppered moths with dark-colored wings increased as pollution from the Industrial Revolution darkened the trees the moths rested on. Which of the following statements best describes how the moths adapted to the new environment over time?

   Based on the diagram, which of the following changes are most likely to occur in the central and eastern tropical Pacific during El Niño?

Which of the following changes would most likely lead to a mammal population exceeding its carrying capacity?

The Devils Hole pupfish is one of the world’s rarest fishes, spending most of its life in the top few meters of very warm waters of a cavern located in the middle of the Mojave Desert. Devils Hole, a geologic pool, is the only naturally occurring habitat for the endangered Devils Hole pupfish. This fish’s habitat is one of the smallest natural ranges known for any vertebrate. Devils Hole is an extreme environment, with water temperatures and dissolved oxygen concentrations near the lethal limits for most fish species.

Chemical compound that can cause algal blooms and cultural eutrophication in streams

A student reads that nanosilver particles are used in cosmetics to allow nutrients to penetrate deeper into the skin. When the cosmetics are washed off, the nanosilver particles can enter freshwater ecosystems. These particles may decrease survival in many aquatic organisms. The student determines that Daphnia magna, a tiny freshwater crustacean widely found in North America, might make a good test subject for an experiment. Which statement below is the most likely testable hypothesis based on the information provided?

Students conducted an experiment to calculate the LD50 of Chemical X on seedlings. They grew separate groups of seedlings in a range of doses of Chemical X. After several days they calculated the percent mortality at each dose and graphed the results. Which of the graphs correctly shows how to determine the LD50 of Chemical X on the seedlings?