The answer is the last one
        
             
        
        
        
Water is considered to be a polar molecule because one side of the molecule is a different charge than the other side of the molecule
        
             
        
        
        
Answer:
Chromosome 11 is made of over
⇒ 130 million base pairs.
Approximately  ⇒ 2000 genes are found on chromosome 11
 
        
             
        
        
        
Sample Response: 
Bacteria are helpful because they produce oxygen, which our bodies need to breathe, and they help us to digest the food we eat. Bacteria are also helpful because they are used in medicine to help us overcome disease. Bacteria are harmful because they can cause tooth decay and illnesses that can be either common or quite serious.
This is a sample response, so it's 100% correct. Peace!