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Topic: Immunology basics and vaccines· Biology and Human Welfare

Given below are two statements :Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of…

Given below are two statements :

Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.

Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is incorrect but Statement II is correct.

2. Both Statement I and Statement II are correct.

3. Both Statement I and Statement II are incorrect.

4. Statement I is correct but Statement II is incorrect.

1 answer

Best answer

Answer: 2. Both Statement I and Statement II are correct.

Key idea: primary lymphoid organs are bone marrow and thymus.

  • Statement I is correct: bone marrow is the main lymphoid organ where all blood cells, including lymphocytes, are produced.
  • Statement II is correct as per NCERT: bone marrow and thymus provide micro-environments for development and maturation of lymphocytes (T cells mature in the thymus).

Both correct: option 2.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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