B. they are single molecules...
        
             
        
        
        
Trees would help make a forest. Tall grass would help make a meadow. Hope this helps!
        
             
        
        
        
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❖ The correct answer choice is B. prokaryote.
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Answer:
O Microscopic models move at a much faster rate than large-scale systems
Explanation:
In the passage it reads, " This small sample of the biosphere changes just like a large-scale ecosystem, except this microscopic model moves at a much faster pace"
Hope this helps :3