The answer you're looking for is C
        
             
        
        
        
Answer:
the answer is nucleolus. 
Explanation:
the production of ribosomes makes it dark or stained 
 
        
             
        
        
        
<span>Aristotle would have trouble classifying euglena since Aristotle's classification system was only for plants and animals. Euglena exhibited characteristics of photosynthesis which is present in plants and movement which is only present in animals. </span>
        
             
        
        
        
Answer:
ANSWER: C 
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Answer:    B. Semicircular canals
Explanation:  Receptors of equilibrium are located in the middle part of the oval-shaped bone labyrinth located in the inner ear. This membrane labyrinth has three  bony channels that contain perilymph in it. In them again lie the semicircular membrane channels and contain endolymph and containing receptors for equilibrium. Thus the purpose of the ear is not only good hearing but also a sense of balance.