Answer: the tree main features of a synovial joint are articular capsule, articular cartilage and synovial fluid.
Explanation:
 
        
             
        
        
        
Iron, water, sugar, salt, nitrogen gas, and oxygen gas
        
             
        
        
        
Answer:
C.facilitated diffusion
Explanation:
Because it have some chemicals did you breathe from the person who using cigarettes.
 
        
             
        
        
        
Answer:
Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.
Explanation:
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DNA<span> contains codes for proteins, which are necessary for the growth and functioning of an </span>organism<span>. </span>DNA<span> separates into long single strands that make up each part of an</span>organism<span>. </span>DNA<span> produces the energy an </span>organism<span> needs in order to grow. </span>DNA<span> folds into the nucleus of each of the </span>cells<span> of an </span>organism<span>.</span>