Answer:
Explanation: osteoporosis occurs when there is an imbalance between bone formation and  bone resorption.
 
        
             
        
        
        
D.) <span>DNA technology can increase genetic diversity by producing more variant alleles.
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A is false.
Respiration breaks down glucose and oxygen, not food.
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A. Carbon dioxide levels are increasing in the air, and the ocean is absorbing carbon dioxide; atmospheric levels are increasing so much that the increase is still apparent even with increasing absorption of carbon dioxide by the ocean. Research conducted by the University of Miami (UM) has found that the waters of the North Atlantic absorbed 50 percent more carbon dioxide of human origin in the last ten years than in the past decade.
The results of the study show the impact that the burning of fossil fuels has had on the world's oceans in the last ten years
        
                    
             
        
        
        
Answer:
there are 4 major classes of biological macromolecules