Since they are reduced it requires less water to stay alive and healthy. and the big stem with a spacious interior is to store maximum amounts of water because of how little precipitation the deserts get
        
                    
             
        
        
        
Answer:
Option D, Zinc is higher on the activity series because there is clear evidence of a reaction.
Explanation:
It is very clear that a metal which is higher in activity will replace a metal having lower activity.  
Since, Zinc has higher activity than copper, it is very sure that it in a copper chloride solution it will replace copper and produce zinc chloride solution leaving behind copper as residue.  
Residues of copper is a clear evidence of reaction  
The chemical equation for this reaction would be -
 
Hence, option D is correct
 
        
             
        
        
        
Answer:
In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth. In a number of other respects, monotremes are rather derived, having highly modified snouts or beaks, and modern adult monotremes have no teeth.