What is different with retroviruses in reproduction is that they do not kill their hosts at first because they can still insert their own genome. This process is what is known the reverse transcription. This is done by different proteins.
        
             
        
        
        
Antibodies, also called immunoglobulins, are proteins manufactured by the body that help fight against foreign substances called antigens. When an antigen enters the body, it stimulates the immune system to produce antibodies. (The immune system is the body's natural defense system.) The antibodies attach, or bind, themselves to the antigen and inactivate it.<span>
Read more: <span>http://www.scienceclarified.com/Al-As/Antibody-and-Antigen.html#ixzz4YlY105DD</span></span>
        
                    
             
        
        
        
Answer:
Ego-depletion.
Explanation:
Ego-depletion may be defined as the idea used to self control upon the mental resources that can be used by the individual. Individual with low mental ability has low self control. 
The individual that suffers from ego-depletion has impair ability to control themselves for the later time. This might even cause the hindering in the self control as well. Self control is important for an individual even at personal levels. The ego-depletion might create hard time for the restraint. 
Thus, the answer is ego-depletion. 
 
        
             
        
        
        
Alyssa's additional observation would be cell Y having a larger vacuole than cell X. The third option is the correct one. 
<h3>Plant cell vs animal cell</h3>
From the observations, both cells are eukaryotic. This is because:
- cell X has lysosomes which are only found in eukaryotic cells
- cell Y has a nucleus which also peculiar to eukaryotic cells only
Lysosome houses digestive enzymes and is found mostly in animal cells. Only a few plant cells have lysosomes. 
Thus, the lack of a lysosome means that cell Y is a plant cell while the presence means that cell X is an animal cell.
Generally, plant cells have larger vacuoles than animal cells.
More on plant and animal cells can be found here: brainly.com/question/1493437
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