A molecule is a group of bonded atoms. Answer a, b, and c all have molecules. For example H2O has the molecule H2 in it. The only compound that doesn't share this trait is answer d: NaCl.
        
                    
             
        
        
        
the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.
Brainliest Please :)
 
        
                    
             
        
        
        
<span>Rebecca is at risk for breech according to the medical opinion of her physician. Her first pregnancy was a breech which could indicate that her uterus might be slightly misshapen.</span>
        
             
        
        
        
Answer:
At one point in Earth's history the mountains were under water
Explanation:
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Because the molecules that are being transported is moving against its concentration gradient. in other words, its moving from where its low in concentration to where its high in concentration