The DNA of a human cell can be cut and rearranged by using Enzymes. To cut DNA into smaller segments, enzyme nucleases are used. They do this by taking the phsophodiester bonds through hydrolysis and catalyzing it. when these enzymes comes into contact with a DNA sequence with a shape that matches a part of the enzyme, called the recognition site, it wraps around the DNA and causes a break in both strands of the molecule. 
        
             
        
        
        
Answer:
endosymbiosis.
Explanation:
By the beginning of the 20th century, researchers thought that plastids and mitochondria could come from bacteria. These would have been ingested by primitive cells and live within them in symbiosis.
 
        
             
        
        
        
DNA serious as the Molecular 
Basics for life DNA copies itself VIA the process of replication,
        
             
        
        
        
<span>Actually baby Aiden will surely develop a strong secretory Iga antibodies which is passive immunity to most of the types of bacteria and viruses, ie, as a protection against infections, which inturn is a response to the baby to its immune system in the form active immunity.</span>
        
                    
             
        
        
        
Pituitary gland: Responsible for growth and reproduction, it secretes and stores hormones and influences how other glands act. 
Adrenal gland: It’s responsible for producing certain steroid hormones, including aldosterone and cortisol.
It's a vague description of the two.