They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
        
                    
             
        
        
        
An electron microscope is a microscope that uses beams of electrons instead of rays of visible light to form highly magnified images of tiny areas materials or biological specimens. Comparing light vs electron microscopes is made more complicated by the fact that there are different types of electron microscopes. Do not need to compound it in the form of essay? I know where exactly you can go to get the help with it. PrimeWritings site would be the best choice. 
 
        
             
        
        
        
The correct answer is letter C. Dendrites <u>receive information from other neurons or from the external environment.</u> Dendrites are part of the neurons that are responsible for receiving information from the axon and the synapses that occur within the Central and Peripheral Nervous System. These dendrites branch off into multiple other synapses in order for the body to create a long chain of nerve impulses.<u />
        
             
        
        
        
<span>The appropriate response is a cork. The cell was first found and named by Robert Hooke in 1665. He commented that it looked peculiarly like cells or little rooms which friars occupied, in this way determining the name. However what Hooke really observed was the dead cell dividers of plant cells (cork) as it showed up under the magnifying lens.</span>
        
                    
             
        
        
        
Answer:
C 
Explanation:
As the Earth moves in relative to the moon the Earth blocks part of the sun from the moon causing only parts of the moon to light up. This BEST answers the question because B is not accurate because it doesn't describe why we actually SEE it. A might be true but it is not the BEST explained.
Hope this helps! (^-^)