Answer:
The correct answer is option A, when there are unlimited resources
Explanation:
In an exponential growth, the size of population increases with a tremendous rate as there is no competition for resources among the species. A common example of exponential growth can be of bacteria, whose population increases tremendously in unlimited supply of nutrients. The exponential growth can be mathematically represented as  
dN/dT=rmaxN  
where r max = maximal growth rate for a species  
N = population of a species
 
        
                    
             
        
        
        
The stage where the doubling time will be the shortest will be the one where replication is taking place the fastest. This phase is known as the exponential phase. This phase is characterized by exponential growth rates of a bacterial colony. 
This phase occurs due the excess amount of resources that are present compared to the amount necessary to sustain the bacterial colony. Therefore, not being limited by resources, the bacteria multiply rapidly. However, the resources then run out due to which replication stop, bringing on the lag phase. Finally, the bacteria begin to starve and die off due to the lack of resources, bringing about the death phase.
        
             
        
        
        
<span> Ribosomes makes mRNA to </span>assemble amino acids into <span>polypeptide chains. The decoding of an mRNA message </span>into<span> a </span>protein<span> is a </span>process <span>known as translation.</span>
        
             
        
        
        
Answer:
Polar bears eventually becoming extinct
 
Explanation:
 
        
             
        
        
        
Limiting nutrient<span>. The concept of a </span>limiting nutrient<span> is essential to understanding the </span>biological<span> processes. The </span>nutrient<span> in short supply relative to the others will be exhausted first and will thus </span>limit<span> cellular growth</span>