Answer:
I'm pretty sure the answers for this is D, C, and B.
 
        
             
        
        
        
The first one, cause their trying to make it a positive way to reinforce. Which just means their trying to fix something again
        
             
        
        
        
Answer:
In medicine, genetic engineering has been used to mass-produce insulin, human growth hormones, follistim (for treating infertility), human albumin, monoclonal antibodies, antihemophilic factors, vaccines, and many other drugs. In research, organisms are genetically engineered to discover the functions of certain genes.
Explanation:
 
        
                    
             
        
        
        
Answer:
The main difference between red brown and green algae is that red algae contain chlorophyll a, chlorophyll d, and phycoerythrin, while brown algae contain chlorophyll a, chlorophyll c, and fucoxanthin and green algae contain chlorophyll a, chlorophyll b, and xanthophylls.