Bacteria is not as complex as human and other animal lives, which means they need less energy and DNA to evolve in these ways.
        
             
        
        
        
<span>Gametogenesis is the process of forming gametes (by definition haploid, n) from diploid cells of the germ line. Spermatogenesis is the process of forming sperm cells by meiosis (in animals, by mitosis in plants) in specialized organs known as gonads (in males these are termed testes).</span>
        
                    
             
        
        
        
Answer:
Sadness has sad feeling. for example, if a friend dies, you will cry. that is what sadness is. 
Explanation: