Answer: Describe the monosaccharides. Monosaccharides are the monomers of carbohydrates and are often referred to as “the simple sugars”.
Explanation: You can often recognize a carbohydrate by its suffix – ose (e.g. glucose, sucrose, cellulose, etc.)
 
        
                    
             
        
        
        
If you are implying one these choices not needed for survival it would be parents only when you can survive on your own (I'm not that sure but I hope this helped the slightest but)
        
             
        
        
        
Answer:
The options are
Complex
Identical 
Inconsistent 
Non-testable
The Answer is Identical 
Explanation:
The groups of scientists in different parts of the world who are dating fossils found in a rock layer of the same geologic time period. The findings have to have some common characteristics which links it to being in the same geologic time period. 
This however validates the fossils having to be identical to match those found in other parts of the world.
 
        
             
        
        
        
I found this photo, i hope it helps
 
        
        
        
Their skin is thin so they're prone to drying out and they cannot hold moisture in their bodies(Waterproof skin)