Answer:
Mitochondria, endoplasmic reticulum, golgi apparatus, or chloroplasts would all be an example.
Explanation:
Unlike prokaryotic cells, eukaryotic cells have a nucleus enclosed in a plasma membrane, as well as the mitochondrias, endoplasmic reticulums, golgi bodies or apparatuses, and chloroplasts. 
 
        
                    
             
        
        
        
The answer to this is older, but it's not a proven fact even though schools teach it as if it were. It is still just a theory if you think about it with how much the earth moves, areas of rock could be complete upside down and no one would know, it would be like history in reverse.
        
                    
             
        
        
        
<span>Nitrogen and phosphorous are the most prevalent aquatic pollution and contribute heavily to the excessive growth of algae in aquatic environments called algae blooms. The nitrogen from the fertilizers is found in molecules called nitrates which are compounds of both oxygen and nitrogen. Phosphorous helps algae to absorb carbon dioxide. So when the phosphorous levels are high the algae absorbs more carbon dioxide, which allows for faster photosynthesis and faster glucose production which leads to faster growth. Although algae need both nitrogen and phosphorous to grow, when the levels are too high the algae grows faster than the ecosystem can sustain leading to oxygen deprivation for the other aquatic organisms.</span>
        
             
        
        
        
Answer: As a bacterium approaches a food source, one would expect: a. flagella to stop spinning. ... 
Explanation: i did this in one of my classes and got a 100%
 
        
             
        
        
        
Some ways would be to use less gas-powered items, such as some stoves. Communities can encourage carpools and walking. If you  were to drive, don't gun the gas and drive at moderate speeds. 
In your own home you can conserve energy by turning off lights and electronic devices when not in use.  You could also use energy efficient light-bulbs.