Answer : B) The rate of growth will slow down by 2100.
It had been reported by the UN that the population will continue to grow worldwide, and come to a halt by 2100.
        
             
        
        
        
The density of a population of living organisms is usually measured in individuals on one square km. In here we have 50 earthworms on an area of 5 square meters, thus we have 10 earthworms on every square meter. In order to get to the result we need to see first how many square meters there are in one square km. One square km has one thousand meters of length and one thousand meters of width so:
1,000 x 1,000 = 1,000,000 km²
Since we established that we have 10 earthworms on every one square meter, we just need to multiply the number of square meters with the amount of earthworms on every square meter:
1,000,000 x 10 = 10,000,000 
So we have a density of 10 million earthworms per square km.
 
        
             
        
        
        
10.00-6.11=3.89
                                     1                              9                                1
10.00- __turns to__
09.00- __turns to__
09.00- __turns to__
09.90- 
06.11 ___________ 06.11____________
06.11 ____________ 06.11
03.89                        02.89                         03.79                         03.89
 
        
        
        
Carbon and nitrogen and an important element of living things. Nitrogen is a major component of DNA and amino acids while carbon can be found in almost all biomolecules. These elements, therefore, need to be renewed and recycled as they are utilized by ecosystems that is ever dynamic.  
 
        
             
        
        
        
The father determines if its male or female. So the father is the carrier and the allele is on the Y chromosome.