Cancer Cells 
EXPLANATION: cancer cells do not respond to the signals that regulate the growth of most cells. Cancer cells,divide uncontrollably and form masses of cells called tumors that can damage the surrounding tissues
        
             
        
        
        
Answer:
B. continent
Explanation:
All three of the other choices are used to classify biomes.
 
        
                    
             
        
        
        
Answer:
C. a decrease in the chromosome number in every generation.
Explanation:
hope it helps .
 
        
             
        
        
        
Please see the attached file for the correct answer
 
        
             
        
        
        
Answer:
Histidine- Proline- Tryptophan- Stop codon
Explanation:
The mRNA strand in the question is produced as a result of a process called TRANSCRIPTION. However, the mRNA transcript is further used to synthesize an amino acid sequence in a process called TRANSLATION. The mRNA sequence is read in a group of three nucleotide bases called CODON. 
Each codon specifies an amino acid which is represented in the GENETIC CODE. In this case, a sequence of mRNA strand is given as: CACCCAUGGUGA
The following codons in the sequence specify the following amino acid:
CAC - Histidine
CCA - Proline
UGG - Tryptophan
UGA - Stop codon
Hence, the amino acid sequence encoded by the given mRNA strand is Histidine- Proline- Tryptophan- Stop codon.
N.B: After a stop codon (UGA, UAA, UAG) is encountered, the translation process stops.