Pure breeding means the same as selective breeding since you take two animals and combine their traits for certain reasons
        
                    
             
        
        
        
The answer is B because continental climate is the combination of both hot and cold climates. The Earth isn't only dry nor is it only polar. It is a combination of both that make up the Earth as it is today.
        
             
        
        
        
Answer:
B
Explanation:
Proteins are made up of smaller building blocks called amino acid.
 
        
             
        
        
        
Answer:
<em>The correct option is B) regulation of mitosis</em>
Explanation:
Cancer can be described as a group of diseases which result from uncontrolled, abnormal cell division. The cell division by which the cells divide (except sex cells) is termed as mitosis. Hence, scientists will be studying the regulation of mitosis if they are to find a cure for cancer.
Other options like option A are not correct because only sex cells divide by meiosis. Hence, regulation of meiosis will not cure cancer.