Answer:
C. Vaccination 
Explanation:
vaccination is the administration of a vaccine to help the immune system develop protection from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. 
 
        
             
        
        
        
Your answer would be C: Arachnids
        
             
        
        
        
C are you dum 
Yes this is so easy give me brainiest
        
             
        
        
        
I believe it would be a primary succession.. (I may be wrong)
        
             
        
        
        
Answer:
a. the coordinated control of gene expression in bacteria
Explanation:
An operon in bacteria is a collection/cluster of genes that are under the control of a single promoter. It includes 3 components: a promoter, the genes and an operator. The operator is where a repressor binds, and the promoter is where transcription begins. 
Operons allow organisms to control the expression of multiple genes in response to environmental cues