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A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea.
 
        
                    
             
        
        
        
Answer:
he Industrial Revolution made machine-based manufacturing more common, and increased the population and average income. Instead of farming, people came to cities to work. The millions of workers moved from farms and cottage industries to cities; which caused rising population. 
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Answer:the phloem transports food and nutrient
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Answer:
absorb the oxygen from water .. then swallowed by the mouth and pumped out the gills.... then pumped out behind the operculum or gill cover
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 just did it