Why is aquaculture causing more problems than it solves?

Which are forms of nitrogen that are usable by humans

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

What controls activities within a eukaryotic cell?