Biotic factors are living factors in an ecosystem while abiotic factors aren't living
Answer:
The answer to the question is C
Through hypothesis and experiments
Explanation:
Immunoglobulin M is the first antibody produced on initial exposure to an antigen. It is also known as IgM.
It occurs as a primary response to the antigens against a particular baterium or virus. It is pentavalent in nature and has ten binding sites for antigens.
Therefore, it is concluded that when the body identifies a bacterium or a virus, it releases the antibody IgM.
Those elements with similar properties are in the same column.
