Answer:
Nanotechnology has bring up major advances in our everyday life. For example, the use of Nanobots that are extensively used now a days in medicine to make surgeries faster and accurate. By the use of nanotechnology, major problems like cancer can be treated by using cell by cell therapy. It is also utilized in curing genetic defects. Major drug designing and drug delivery has been made easier using nanotechnology.
Nanotechnology doesn't have any visible disadvantages but there always remains a fear like introduction of some extra contaminants and toxins in the environment. But mostly i agree with use of nanotechnology for the betterment. Furthermore we don't have any more advance techniques to fight problems than this technology. 
 
        
             
        
        
        
Answer:
crust, outer mantle, inner mantle, and core
Explanation:
Hope this helps
 
        
             
        
        
        
Answer is False
Predator- prey is example of predation
 
        
             
        
        
        
Answer: True 
Explanation:
It should be noted that nutrition, exercise, and genetics contribute to the optimal personal health of an individual. 
Good nutrition has a positive effect on the health of individuals. Exercise is also good for ones body. Some environments can being about an increase in the risk of developing certain diseases as well as ones genetics as some diseases are hereditary. 
 
        
             
        
        
        
An organ is a body structure composed of tissues that have related functions. The human body has levels of organization. <span>The cell is the basic structural and functional unit of a living organism which communicates with different and similar cells in order to work together and carry out all physiological processes. <span>Cells with similar structures are grouped together in a tissue to perform a shared function. A group of tissues forms an organ that together with other organs make organ system. The integrated activity of all the organ systems makes the whole organism.</span></span>