Over the past several decades, natural selection has caused populations of
Staphylococcus aureus (a type of bacteria that causes infectious wounds)
to evolve resistance to most antibiotics. If antibiotic use were stopped,
what would you predict would happen to these S. aureus populations? *
m
O
They will go extinct without the antibiotic
O
The frequency of resistant forms will increase in these populations
The populations will begin colonizing new environments
The frequency of nonresistant forms will increase in these populations

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.