What is (are) the role(s) of complement proteins in the immune response?
I. They attract white blood cells to the site of infection.
II. They help other cells avoid infection.
III. They cause pathogens to clump together, making the pathogens easier to identify and destroy.
IV. They form a pore in the plasma membrane of a pathogen, causing it to rupture.
I only
II and IV only
II and III only
I and IV only
I, II, and IV only

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