Answer:
The muscle tissue shortens to performs it's function which we know as muscle contraction
 
        
             
        
        
        
Answer:
The artery has a thick membrane to prevent nutrients and oxygen in the blood from being lost while transported.
The blood thick membrane to help reduce the pressure the blood following in it is coming with.
 
        
             
        
        
        
A genome is the complete set of a organisms genes. 
Genomics is a zone inside of hereditary qualities that concerns the sequencing and investigation of a life form's genome. 
So it has to be D. The study of the genomes of organisms
        
             
        
        
        
The answer is C as the genetic correspond with the order of the nucleotides
        
             
        
        
        
<span>b. Exercise
If we conduct a research investigation in these given situation. More specifically, an experiment this would suggest a most probable scenario of a cause and effect situation or technically called causality. 
Here the Independent variable is the exercise 
The dependent variable is the endurance.
Hence regular EXERCISE increases endurance. </span>