If you are doing a quiz...then maybe you need this...
https://quizlet.com/137205156/exam-3-bio-102-gleeson-flash-cards/
        
             
        
        
        
Answer:
True
Explanation:
The linkage relation of two genes can be determined on the basis of calculating recombination frequency.
If the recombination frequency value is greater than 50% then the genes are not linked and if the value is less than 50% then the genes are linked.
In the given question, the  crossover gametes formed will be Ab = 100
and aB= 106.
Therefore,
  
 
Since the recombinant frequency value is larger than 50% therefore the genes do not show linkage.
Thus, True is the correct answer.
 
        
             
        
        
        
<span>The appropriate justification of this is that B. As hydrilla is aquatic in nature, the roots do not have to search for minerals, and there is no need for xylem to absorb nutrients because the plant is surrounded by water that has dissolved nutrients in it. </span>
        
             
        
        
        
Earth has a lower average temperature than the moon. Although, some might think that the earth has a higher average temperature because the earth is hot. Yet, the moon has far more avaerage temperature than the earth because the earths atmosphere blocks the suns radiation from directly hiting it. Also, the moon doesn't have a atmosphere to keep away the suns radiation.
        
             
        
        
        
Explanation:
it shields humans and other living things from ultraviolet rays