Nephrons are the filtering structures of the kidneys. The
kidneys contain millions and millions of these tiny filtering structures that
are responsible for cleaning the blood. Nephrons are responsible for removing
excess water, wastes, and other substances in the blood that are not needed by
the body. They also return necessary substances (e.g. sodium, potassium,
phosphorus) whenever the body runs low in supply.
 
If these nephrons are damaged, blood will not be properly
filtered. As a result, the kidney will have different diseases and this might
lead to kidney and multiple organ failure.
 
 
 
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Answer:
true
Explanation:
a virus needs a host to replicate its like fleas they lay eggs on dogs to replicate 
 
        
             
        
        
        
Genetic variation<span> occurs </span>mainly<span> through DNA mutation, gene flow (movement of genes from one population to another) and sexual reproduction</span>
        
                    
             
        
        
        
Answer:
Beautiful Huntresses: Scientists Explain Why Mantises Evolved To Resemble Orchids : The Two-Way Typically, when insect females evolve to become larger than males, it's in order to produce more offspring. But female orchid mantises evolved to look like flowers for a sinister reason: to hunt prey.