I think the answer is b. wavelength (:
        
             
        
        
        
Population bottlenecks.  but their genes still carry the marks of this bottleneck: they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted. 
 
        
                    
             
        
        
        
<u>Answer:</u>
The series dilution method is the step wise dilution technique where the dilution factors remain constant in each step.  
The advantages of using the series of dilution method over simple dilution are stated below: 
<em>a)        Aids in reduction of a dense culture of cells to a more usable concentration.</em>
<em>b)        In every step of dilution the specific amount of bacteria is removed. </em>
<em>c)        Helps in the estimation of concentration of an unknown sample.</em>
<em>This sums up the advantage of using the series dilution technique.</em>
 
        
             
        
        
        
Answer:
Chlorophyll is any of several related green pigments found in the mesosomes of cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words χλωρός, khloros and φύλλον, phyllon. Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light.
Explanation: