True. if thats what you're looking for
        
             
        
        
        
I believe true because the Precambrian is the first geologic time, going back 4600-570 years ago, meaning it should contain the earliest of things.
        
                    
             
        
        
        
Taking multiple antibiotics at the same time contributes to antibiotic resistance. Thus, the correct option is B. 
<h3>What is Antibiotic resistance?</h3>
Antibiotic resistance may be defined as a process or strategy of microorganisms that generate the capability to conquer the drugs developed to annihilate them.
Overprescription of multiple antibiotics increases the ability of bacteria or other microorganisms to survive in harsh little conditions. Still, slowly they evolve themselves and resist the situation of the high effect of antibiotic resistance drugs. 
Therefore, it is well described above. 
To learn more about Antibiotic resistance, refer to the link:
brainly.com/question/7385027
#SPJ1
 
        
             
        
        
        
These alternative genes are called alleles