DNA is unzipped by helicase at the origin of replication. There are several origins of replications in eukaryotic DNA replication, while only one in prokaryotic replication.
        
             
        
        
        
Answer: Whether the culprit were too much sunlight or not enough, if photosynthesis stopped, plants would stop converting carbon dioxide -- an air pollutant -- to organic material. 
Explanation:
 
        
             
        
        
        
Answer:
CROSSING OVER is the exchange of segemetics of dna or genetic matierial between the members of the pairs of cromezones
 
        
             
        
        
        
B. Club moss
Explanation:
This is because club moss is an seedless evergreen plants that have scale-like leaves. 
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