The four bases in DNA are: adenine, thymine, cytosine, guanine.
In RNA, thymine gets replaced by uracil. 
Purine is only a name for the two bases guanine and adenine. 
        
             
        
        
        
Answer:
The correct answer is option A. "The contents of blood come into closer contact with tissues in a closed system than an open system".
Explanation:
In a closed circulatory system, the blood has an specific path, circulating from arteries to veins and to smaller blood vessels throughout the body. This is in contrast with open circulatory systems at which the blood is not contained in arteries or veins but it suffuses the body. A closed circulatory system have many advantages over open circulatory system, however in a closed circulatory system the contents of blood are not into closer contact with tissues in than an open system. Actually, in an open circulatory system the blood is in closer contact with tissues.
 
        
             
        
        
        
Embryonic tissue supporting filling and photosynthetic 
Ground tissues conducting
Vascular tissues and covering 
Dermal tissue
        
             
        
        
        
A cladogram is similar to Family Tree  
Explanation:
A cladogram and a family tree both show relationships between common ancestors. It shows the relationship the organism but it is not same as evolutionary or family tree because it doesn’t show the relationship with ancestor to their descendent and also it doesn’t show how they changed. 
Cladogram is type of diagram based result analysis. Clade is group of organism with their last similar ancestor. A cladogram is represented through lines.  
 
        
             
        
        
        
Water is more of a radical it brings moisture and it has great power in its surf clouds are made from the moisture water is like a power sorce for storms and other things