Answer:
The reason hydrogen bonding occurs is because the electron is not shared evenly between a hydrogen atom and a negatively charged atom.
Explanation:
Hydrogen in a bond still only has one electron, while it takes two electrons for a stable electron pair. Any compound with polar covalent bonds has the potential to form hydrogen bonds.
 
        
             
        
        
        
They produce food with energy from the sun
        
             
        
        
        
Answer:
Treatment of industrial effluents through the extraction of pollutants before discharge to the rivers
Explanation:
Water contamination is the addition of undesirable materials into rivers, lakes and other bodies of water. Polluted water is unclean and unsafe to use therefore policies are designed to reduce water contamination that possesses risk to human health.
 
        
             
        
        
        
Answer:
D. organ systems
Explanation:
Organs and tissues that perform the same function are called organ systems
 
        
             
        
        
        
The codon loop.............