Answer: When the protein for a particular gene is formed, the gene is expressed
Explanation:
Gene expression is the process in which the information from a gene is used for the synthesis of protein. The gene code for protein and the protein regulate the function of the cell in the body.
into RNA by the help of enzyme RNA polymerase. The next step is the translation in which the messenger RNA is decoded in the ribosome to produce a specific amino acid or the polypeptide chain that perform a specific function in the cell.
 
        
             
        
        
        
Answer: 
1) 3 seismic stations 
2) used to determine the distance between the station and an earthquake
3) Yes it is cyclic but not periodic
  
        
             
        
        
        
<span>B is the correct answer. The beginning of DNA replication occurs with the unwinding of the DNA helix by a special enzyme. The two strands that form the helix then create a replication fork. The two strands are then oriented differently, one becoming the 'leading strand' and one the 'lagging strand'. </span>
        
             
        
        
        
Answer:
Your correct answer is B. 
Explanation:
 
        
             
        
        
        
Answer:
Alternation of generations in plants permits both mitosis and meiosis but at different stages. 
The zygote will undergo many rounds of <u>mitosis</u> and give rise to a diploid multicellular plant called a sporophyte. Specialized cells of the sporophyte will undergo <u>meiosis</u> and produce haploid spores.
Hope it helps, 
I'm not so sure.