Prokaryotes: the simplest and oldest form of life, single celled, start of live/where all life came from, they can live in any environment on Earth, bacteria are the only prokaryotes. They DO NOT have a nucleus. Tails help them move along with little hairs around the cell. No organelles, they have circular chromosomes, they're unicellular or colonial, they have a cell wall and cell membrane.
Eukaryotes: Have a nucleus as well as organelles, linear chromosomes, have a cell wall (plants&fungus), have a cell membrane.
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The answer is excretory system
        
             
        
        
        
It is a condition that occurs when bacteria change in a way that reduces the effectiveness of drugs, chemicals or other agents designed to cure or prevent infections.
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C) reproduce on it's own!