Primary= peptide bonds
secondary= hydrogen bond 
tertiary= weak bonds, hydrophobic, disulfide bridges, salt bridges 
quaternary= between polypeptides 
        
             
        
        
        
Answer: A.
Explanation:
Proteins are the things that determine what functions will play out. They are the reason we are able to digest foods, transfer oxygen throughout the body. Proteins MAKE these functions happen. Without proteins, we wouldn't be able to do anything
 
        
             
        
        
        
Answer:
There is a family called Cercopithecidae where monkeys belong.
 
        
             
        
        
        
Answer:
Respiration links up the simple sugar, <u><em>glucose</em></u><em>,</em> with the gas <u><em>oxygen .</em></u>
Explanation:
In the process of respiration, oxygen is used to breakdown glucose. Water and carbon dioxide are produced due as a result of this reaction. A huge amount of energy, in the form of ATP is also released during this process. ATP is used by almost every cell of the body to carry out normal cellular functions. Energy is mainly stored in the linkage between the second and third phosphate of an ATP molecule.