They can create competition within a certain niche
Cytosine pairs with Guanine
Adenine and Thymine are pairs also
Hope this helps :)
Explanation:
After repeated stimulation by antigen, B cells can make antibodies that bind their antigen with much higher affinity a process called affinity maturation. ... Thus, antigen stimulation greatly increases the antibody arsenal. Antibodies are proteins, and proteins are encoded by genes.
D. In a regimen of two to four drugs
