Question

Match LIST-I with LIST-II
\begin{tabularx}{0.8\textwidth}{|l|X|l|X|} \hline \multicolumn{2}{|c|}{LIST-I} & \multicolumn{2}{c|}{LIST-II}
\multicolumn{2}{|c|}{Parts of Mesoderm} & \multicolumn{2}{c|}{Body parts formed}
\hline A. & Intermediate Mesoderm & I. & Notochord
B. & Chorda Mesoderm & II. & Circulatory system
C. & Paraxial Mesoderm & III. & Kidney
D. & Lateral Plate Mesoderm & IV. & Skeletal Muscle
\hline \end{tabularx}
Choose the most appropriate answer from the options given below:

• A. A - I, B - II, C - III, D - IV
• B. A - III, B - I, C - IV, D - II
• C. A - II, B - IV, C - I, D - III
• D. A - IV, B - III, C - I, D - II

Hint:

Create a mental map of the mesoderm cross-section from the center outwards:

\textbf{Center/Axial (Chorda):} Notochord
\textbf{Next to center (Paraxial):} Somites (muscle, vertebrae)
\textbf{In between (Intermediate):} Kidneys/Gonads
\textbf{Outermost (Lateral Plate):} Circulatory system, Body cavity lining \end{itemize}

Answer 1

The Correct Option is B

Step 1: Concept Overview:
During embryonic development, the mesoderm differentiates into distinct regions, each forming specific tissues and organs. This question assesses knowledge of these mesodermal derivatives.

Step 2: Detailed Matching Breakdown:
- A. Intermediate Mesoderm: Located between the paraxial and lateral plate mesoderm, it develops into the urogenital system, including the kidneys and gonads. Therefore, A corresponds to III.
- B. Chorda Mesoderm: The axial mesoderm along the embryo's midline, forming the notochord. The notochord is a key signaling center for the developing nervous system and vertebral column. Thus, B corresponds to I.
- C. Paraxial Mesoderm: Located on either side of the neural tube, it segments into somites. Somites differentiate into the myotome (skeletal muscle), sclerotome (cartilage and bone of the vertebral column), and dermatome (dermis of the skin). Hence, C corresponds to IV.
- D. Lateral Plate Mesoderm: The most lateral mesoderm, splitting to form the lining of the body cavity (coelom). It develops into the heart, blood vessels, and blood cells of the circulatory system, plus smooth muscle of the gut and limb bones. Consequently, D corresponds to II.

Step 3: Final Solution:
The correct matches are A-III, B-I, C-IV, D-II, which is option (B).