Assume Species 1, 2, and 3 are normal gut inhabitants and are not pathogenic. Species 4 represents a pathogen such as C. difficile. Explain, using data from this simulation, how C. diff can be caused by overuse and misuse of antibiotics. How do the number and distribution of bacteria differ when the prescribed treatment regimen is followed and when antibiotic treatment is stopped prematurely?

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey