Explanation:
so X-linked agammaglobulinemia (XLA) is a rare genetic disorder discovered in 1952 that affects the body's ability to fight infection. As the form of agammaglobulinemia that is X-linked, it is much more common in males.
So in rheumatoid arthritis Typically, stiffness begins in the joints of the hands. It usually comes on slowly, although it can come on suddenly and affect multiple joints over the course of one or two days... I hope this helped you answer your question :)
Answer:
because stagnat water contains bacteria and it is the breeding place of mosquitoes
He's actually a biologist who specializes in organic chemistry. But since that's not in the answer choices, i'd recommend putting Scientist or Dermatologist.