Rarefaction in terms of ecology can be defined as a technique used to assess species richness from the results of sampling. 
It allows the calculation of richness of a particular species for a given number of individual samples, and these are based on the construction of rarefaction curves.
Hence, the correct answer is: option A-Creating a representative sample
 
        
                    
             
        
        
        
The answer is decomposers.
After the death of producers and consumers, decomposers (such as Actinobacteria, or other bacteria which are prokaryotes) eat that dead organisms and carbon, nitrogen, and other elements are released into the environment. It should be taken into consideration that eukaryotes (such as fungi) can be decomposers as well.
 
        
        
        
Answer:
2, 3 and 4 only.
Explanation:
Mutations refer to change in genetic content or alterations of DNA which might be as a result when the DNA is copied or due to environmental factors like Ultraviolet radiation.
Majority of mutations have neither positive or negative effects on organisms the occur and they are called neutral mutations.
An example is silent points mutations which does not alter the amino acids it's encode.
Some Mutations have positive effects and some have negative effects which cause genetic disorder.
 
        
             
        
        
        
Answer:
Photosyntesis
Explanation:
the photosyntesis is a process. PLS LIKE I NEED POINTS