Is nucleolus found in prokaryotic and eukaryotic

Which identifies the main purpose of biological taxonomy?

During convection, less dense fluid rises and denser fluid sinks.

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.