Coleoptile and coleorhiza are protective coverings in Maize grain. Which is true ?

Options

A. Coleorhiza is a covering on plumule
B. Coleoptile is a covering on radicle
C. Coleoptile is a covering on plumule
D. Coleorhiza is a covering of endosperm

Answer

To determine which statement is true regarding coleoptile and coleorhiza in maize grain, we need to understand the definitions and functions of both structures.

### Step-by-Step Solution:

1. **Understanding Coleoptile**:
- Coleoptile is a protective sheath that surrounds the plumule (the embryonic shoot) in monocot seeds, including maize. It helps in protecting the young shoot as it emerges from the soil.

2. **Understanding Coleorhiza**:
- Coleorhiza is a protective covering that surrounds the radical (the embryonic root) in monocot seeds. It plays a crucial role in protecting the young root as it develops and grows into the soil.

3. **Identifying the Correct Statements**:
- Given the definitions, we can analyze the options:
- Coleorhiza covers the radical (true).
- Coleoptile covers the plumule (true).
- Coleorhiza does not cover the endosperm; it specifically covers the radical.
- Coleoptile does not cover the radical; it specifically covers the plumule.

4. **Conclusion**:
- The correct statement is that "Coleoptile is covering on plumule" and "Coleorhiza is covering on radical." Therefore, the true statement from the options provided is that coleoptile covers the plumule.

### Final Answer:
- The correct option is: **Coleoptile is covering on plumule.**