Antibody mediated immunity & cell mediated immunity are represented respectively by :-

Answer

**Step-by-Step Solution:**

1. **Understanding Antibody Mediated Immunity:**
- Antibody mediated immunity is also known as humoral immunity.
- It is primarily mediated by B lymphocytes (B cells).
- B cells produce antibodies that bind to antigens, neutralizing them or causing their destruction.

2. **Role of B Lymphocytes:**
- B lymphocytes mature in the bone marrow.
- Upon activation, they differentiate into plasma cells, which secrete antibodies, and memory cells, which provide long-term immunity.

3. **Understanding Cell Mediated Immunity:**
- Cell mediated immunity occurs within infected cells and is primarily mediated by T lymphocytes (T cells).
- T cells do not produce antibodies but instead directly attack infected or cancerous cells.

4. **Role of T Lymphocytes:**
- T lymphocytes mature in the thymus.
- They can differentiate into various types of cells, including killer T cells (which destroy infected cells), helper T cells (which assist other immune cells), and suppressor T cells (which regulate the immune response).

5. **Conclusion:**
- Therefore, antibody mediated immunity is represented by B lymphocytes, while cell mediated immunity is represented by T lymphocytes.

**Final Answer:**
Antibody mediated immunity is represented by B lymphocytes, and cell mediated immunity is represented by T lymphocytes.

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