They Are Called Sound Waves.
This is what lets our ears hear "Listen" To noise
i hope this helps you
        
                    
             
        
        
        
<span>In the "all or none" law of muscle contraction, it states that when the stimulus applied exceeds threshold then the the nerve sending signals to a few muscle fibers will give a complete response; contraction. Graded response is dependent on how many motor units have been recruited. The more motor units, the greater the force in the contraction.</span>
        
             
        
        
        
C. light-years is the best to describe the distance
        
             
        
        
        
The temperature-dew point spread will increase with heating and decreasing with cooling 
        
             
        
        
        
Answer:
Haploid number of chromosomes.
Explanation:
Before fusion of sex cells i. e. sperm cells and egg cells, there are half number of chromosome present in each sec cell because in the sex cells meiosis occurs. Meiosis is a type of cell division in which a single parent cell divides into four daughter cells having haploid chromosome i. e. half number of chromosomes in each daughter cell. So when these sex cells fuse together, they form a diploid organism.