44) Which question should one ask when trying to classify an unknown cell as prokaryotic or eukaryotic?
A) Does the cell reproduce?
B) Does the cell use energy?
C) Does the cell have membrane-bound organelles?
D) Does the cell make proteins from its DNA?

Which of the following typically characterizes a tropical rainforests

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.

How water is moving through the ecosystem ?