A nucleus cytoplasm that’s the answer
        
             
        
        
        
The dose should be adjusted to achieve and maintain therapeutic drug levels
        
             
        
        
        
Answer:
Fossil fuels
Explanation:
The definition of "fossil fuel" is "a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms"
 
        
             
        
        
        
Answer: Science is a collection of knowledge about the natural world, but it is also the process of discovering how the natural world works.
Explanation: