The two answers I have to share is:
-amino acids
-it’s shape
Chargaff's rules state that DNA from any cell of all organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine .
Answer: The role an organism plays in its community is its niche. I Know this is right cause I took this test last year in 11 grade.
Human Immunodeficiency Virus is your answer
