Which is one of the six fundamental elements that are found in living organisms?
Collenchyma and Parenchyma because they are cellulose containing cells.
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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.
Healthy Ecosystems I believe