Answer:
When populations are separated by a barrier forming a new species
 
        
             
        
        
        
 <span> A </span>test cross<span>, involves the breeding of an individual with a phenotypically recessive individual.
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Answer:
Oncogenes.
Explanation:
Cancer is the harmful disease that causes several death in the world. Cancer occur due to the mutation in the genes that are responsible for the regulation of apoptosis  and cell divisions.
The virus are also oncogenic in nature and can cause several different type of cancer. The human papilloma virus can be transmitted from the skin contact. The virus cause cervical cancer and genital warts. The integration of this virus into host genome increases the expression of viral oncogenes in the host DNA. 
Thus, the answer is oncogenes. 
 
        
             
        
        
        
Answer:
Explanation:
chaperonins
Members of the Hsp60 family (also called chaperonins) facilitate the folding of proteins into their native conformations. Each chaperonin consists of 14 subunits of approximately 60 kilodaltons (kd) each, arranged in two stacked rings to form a “double doughnut” structure 
 
        
             
        
        
        
B the origin of new matter in the steady state theory???