Answer:
More exposure causes mutation in bacteria.
Explanation:
More exposure to the antibiotic by non-resistant  bacteria causes change in its structure against the environment and as a result of that change the bacteria get resistance against that antibiotic. No, farmers should not be allowed to put low doses of antibiotics in  animal feed because it has no effect on the antibiotic-resistant bacteria. The farmer should use another antibiotic on the antibiotic-resistant bacteria which they have no resistance.
 
        
             
        
        
        
Answer:
1 = True Ribs or Vertebrosternal Ribs
2 = False Ribs or Vertebrochondral Ribs
3 = Floating Ribs
4 = Thoracic Vertebrae 1 (T1)
5 = Ribs 
6 = Coastal Cartilage
Explanation:
Thus, The Whole Structure is known as Rib Cage or Thoracic Cage
<u>-TheUnknown</u><u>S</u><u>cientist</u>
 
        
             
        
        
        
Phosphate groups of the nucleotides in the diagram are marked with W. 
Option C. 
<h3><u>Explanation:</u></h3>
DNA is a macro molecule which is formed of polymerization of deoxyribonucleotides. Four types of deoxyribonucleotides are present which are adenosine, guanosine, thymidine and cytosine triphosphate. These nucleotides are polymerized based on the genetic setup.
The phosphate groups attached with the sugar molecule are actually polymerized with the o glycosidic bond. That's marked with the letter W. These phosphate molecules are attached with the sugar molecules which actually are attached with the nitrogen bases. They in total forms a nucleotide, hence the whole DNA. X in the diagram are nitrogen bases and the Y are the hydrogen bonds between the complementary nitrogen bases