<span>#1) With reference to the role of oncogenes, explain how the normal controls over the cell cycle can be lost.
Answer: The way that cell cycle can be lost is by going through changes in the activity of cell cycle regulators. Cancer causes different types of mutations. There are two types of cell cycle regulators that can promote the development of cancer: 
-Positive Regulators that can be over activated (become oncogenic).
-Negative Regulators (tumor suppressors) which can be inactivated.
I hope it helps, Regards. <span /><span>
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Answer:
...
Explanation:
Bohr's model of the atom states that electrons orbit an atom's nucleus in electron shells of increasing energy. ... Thomson's model, or the plum pudding model, it describes atoms as spheres of positively charged matter, in which electrons are embedded in
 
        
             
        
        
        
Answer:
Solar energy 
Explanation:
This is because the sun is used 
 
        
                    
             
        
        
        
Forensic scientists who study possible forgeries and questioned documents are often called forensic or legal linguists.
Forensic linguistics is a branch of linguistics that deals with such illegal kinds of documents so as to solve a certain crime.