Because they are prokaryotic cells.
        
                    
             
        
        
        
ITS D I THINK PRETTY SURE BUT DO TAKE MY WORD FOR IT.
        
             
        
        
        
When a animal changes their body over long periods of time with mating with other species to develop different characteristics.
        
             
        
        
        
Answer: Im pretty sure it´s D.
Explanation: Manatees like to raise and feed their young in safe places so if we increase the amount of protected areas their population is more likely to increase. 
Hope this helps!
 
        
             
        
        
        
Answer:
I just answered this same question for my Biology class hope this helps :) 
Explanation:
A hydrogen bond is when positive and negative hydrogen forms together; this explains why cohesion sticks molecules together . Because of cohesion, the water molecules stick together and form a surface; this property is responsible for surface tension. Adhesion is the ability for water to stick to other substances; this helps with capillary action. Hydrogen bonding also explains why water's boiling point is higher than some liquid . With this, water has a high specific heat; this is because the water takes a lot of energy to raise (or lower) the temperature. Once again, hydrogen bonding is essential to another property. This property causes water to expand and to have a low density when frozen.