What is the main function of the cell membrane? A) To maintain homeostasis by controlling what enters and leaves the cell.
B) To prevent water from entering the cell.
C) To produce ATP and provide cells with the energy they to do work.
D) To act as structural support and form fiber in the diet of animals.

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.