Question

Coelom is found between

• A. body wall and ectoderm
• B. ectoderm and endoderm
• C. mesoderm and body wall (endoderm)
• D. mesoderm and ectoderm.

Answer 1

The Correct Option is C

In biology, a coelom refers to a fluid-filled body cavity fully lined by tissue derived from mesoderm. Understanding the organization of body layers is crucial for determining the placement of the coelom. Let's analyze the options provided:

1. Body wall and ectoderm - The ectoderm is the outermost layer of cells or tissue of an embryo in early development. Typically, the body wall could encompass the ectoderm in non-coelomate organisms, but this does not describe the placement of a coelom.
2. Ectoderm and endoderm - These are the outermost and innermost layers, respectively. Generally, a coelom is not situated between these layers because the mesoderm is not involved.
3. Mesoderm and body wall (endoderm) - This placement correctly describes the area where a coelom might be found within coelomate animals. The mesoderm is involved in forming the lining of the coelom.
4. Mesoderm and ectoderm - While the mesoderm is adjacent to these layers during development, the coelom is typically considered to be fully within the mesoderm, not between it and the ectoderm.

Thus, the correct answer is the coelom is found between the mesoderm and body wall (endoderm).