A virus's ability to infect an animal cell depends primarily upon the "<span>presence of receptor sites on the cell membrane"
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Explanation:
The chemicals are contaminant in the ground water system and they can inflict serious health hazards on humans when water is sourced from such polluted ground water system. 
- Consuming contaminated water can lead to cholera and diarrhea. 
- It makes ground water toxic and poisonous. 
- Drinking contaminated ground water can lead to the introduction of heavy metals in the body. 
- Chemical wastes containing radioactive materials can damage body tissues. 
- They render ground water unsafe for drinking ans usage. 
Learn more: 
Air pollution brainly.com/question/10743354
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RNA, touches nearly everything in a cell. RNA carries out a broad range of functions, from translating genetic information into the molecular machines and structures of the cell to regulating the activity of genes during development, cellular differentiation, and changing environments. RNA is usually catalyzed by an enzyme. RNA polymerase using DNA as a template, a process known as transcription. The enzyme then progresses along the template strand.
        
             
        
        
        
Fungi lacks the ability to produce their own food because they do not have chloroplast which is needed to obtain energy from the sun and convert it into food. Also fungi lack ability to fix nitrogen which has to be incorporated into their food. They also can not fix carbon and utilize it to produce food. Because of these they have to depend on dead organic matters for food.
        
             
        
        
        
Your heart circulates your blood throughout your body everytime it beats.