Answer: here please read the Difference between Natural gas and fresh air...
Explanation:
I just finished a worksheet with this question and my text book said it was Chlamydia
THE ANSWER IS INFECTIOUS AGENT THANK YOU FOR LETING ME HELP YOU
Larry is taking a walk in the park. The pollen in the air makes him sneeze constantly. The line of defense that is his immune system exhibiting is that of "(A) first line of defense." There are only 3 lines of defense in the immune system. The first line of defense are a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. In this case, it is the nasal cavity.
