Some illnesses and harmful infections are caused by bacteria. these bacteria grow in the human body and often make people sick with symptoms like coughing, sneezing, and fever. these illnesses are not related to any genetic mutations or other problems with dna. why would gene therapy fail to cure illnesses caused by bacteria?
a. gene therapy reduces symptoms but never cures illnesses.
b. gene therapy does not work on most people.
c. gene therapy only focuses on replacing mutated genes.
d. gene therapy is too long a process.

c

Explanation:

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

"it built up in the atmosphere"

i think thats it, idk, i tried looking for this exact q& a for grad. and idk if i got this question right or sorry if im wrong