In the world's oceans 90% of the biomass is microbial with viruses turning over 20% of that daily. without the turnover of biomass driven by viruses many sources of food would not be present for other organisms
        
             
        
        
        
Answer:
True 
They all are pruning methods because they are all for pruning grape vines
 
        
             
        
        
        
Competition is the interaction in which both are harmed....
        
                    
             
        
        
        
Solution:
The troposphere is the atmospheric layer closest to the planet and contains the largest percentage (around 80%) of the mass of the total atmosphere. 
The troposphere is the lowest major atmospheric layer, extending from the Earth's surface up to the bottom of the stratosphere. The troposphere is where all of Earth's weather occurs. It contains approximately 80% of the total mass of the atmosphere.  
The troposphere is characterized by decreasing temperature with height (at an average rate of 3.5 degrees F per thousand feet, or 6.5 degrees C per kilometer). In contrast, the stratosphere has either constant or slowly increasing temperature with height.  
Thus the right answer is troposphere.