Answer:
Columnar epithelial cells are elongated and column-shaped and have a height of at least four times their width. Their nuclei are elongated and are usually located near the base of the cells. Columnar epithelium forms the lining of the stomach and intestines
Explanation:
Epithelium - Wikipedia 
Hope this helps : )
 
        
                    
             
        
        
        
Answer:
In humans, there is a readiness to perceive ourselves on priority and favorably. This is one of the reasons that helps in increasing the remembering memories of events that are favorable to the individual which results in benefits, it is known as self-serving bias.
Self-esteem is something that helps in knowing the self-worth and the importance of happiness of one's own. Being aware of environmental control result in achieving better in life and experienced less stress.  The potential use of the capabilities of individuals results in increasing awareness about what is the purpose of the life of an individual.
 
        
             
        
        
        
<h2><em>what is the main theme in reproduction.</em></h2>
- <em>The five central themes of biology are</em><em> </em><em><u>structure and function of cells, interactions between organisms, homeostasis, reproduction and genetics, and evolution</u></em>
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