Exergonic is the term in the passage that is most likely be used only in a scientific context.
<u>Explanation:</u>
The term Exergonic  is used in a scientific context in the given passage. The chemical reactions takes place either absorbing or releasing energy to its environment in which the reactions takes place. This is due to the breaking or the formation of chemical bonds. It mainly depends on the bond's strength.
When energy is given to the environment in which it takes place then it is called as exoergonic reaction. This occurs due to high strength of the chemical bond that is formed. When energy is absorbed from the environment in which the reaction takes place, it is known as endergonic. The bond that is formed will be weaker and not stronger. 
 
        
             
        
        
        
The correct answer is: There are 20 primary teeth, and by 24 months of age most children have all 20.
Primary teeth also known as deciduous teeth, milk teeth, are the first set of temporary teeth in the growth development of humans. They develop during the embryonic stage of development, become visible in the mouth during infancy (erupt) and usually get replaced by permanent teeth around age six (the first tooth). The primary teeth consist of 4 central incisors (one in each quadrant), 4 lateral incisors, 4 canines, 4 first molars, and 4 secondary molars.
 
        
             
        
        
        
The answer is B. 
Animals do cellular respiration which requires the intake of oxygen and the output of carbon dioxide. In order for plants to do photosynthesis, they need carbon dioxide to be able to make oxygen for animals to breathe.
 
        
                    
             
        
        
        
Cell walls are made out of cellulose and they give a sturdy structure to the cells (if you notice they have a rectangular shape)
        
             
        
        
        
A. Group of cells
Cells - Tissue - Organ ...
If you want to know more - look for "Biological Organisation"