Marine biologists are concerned that pollution from a nearby factory has affected the health of local sea urchins. Which of the following is most
likely to be the population of interest? *
A. 4 sea urchins with abnormal coloration
Q
B. All of the sea urchins in the entire ocean
C. 20 sea urchins gathered from tidal pools
D. All of the sea urchins near the plant

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.