For mutations to affect an organism's descendants, they must: 1) occur in cells that produce the next generation, and 2) affect the hereditary material. Ultimately, the interplay between inherited mutations and environmental pressures generates diversity among species.
        
             
        
        
        
Answer:
A. motor neurons; peripheral nervous system
Explanation:
Motor neurons carry signals from the peripheral nervous system to the muscles. This causes the muscles to either relax or contract. Note that the peripheral nervous system consists of neurons and parts of neurons outside of the central nervous system which consists of the brain and spinal cord. When signals are transmitted between the motor neurons and peripheral nervous system, this causes a response to stimulus in the muscles which would either, relax or contract.
 
        
                    
             
        
        
        
Answer:
The answer would be the first one: Binding of ribosomes to mRNA.
 
        
                    
             
        
        
        
The mitochondria is the site of respiration and energy production. 
 
        
             
        
        
        
A. In prophase I, tetrads of homologous chromosomes form and crossing over occurs
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