Coleorhiza and coleoptile are the protective sheaths covering_______and__________respectively.

Options

A. radicle,plumule
B. plumule,radicle
C. plumule,hypocotyl
D. epicotyl,radicle

Explanation

To answer the question, "Coleorhiza and coleoptile are the protective sheaths covering_______and__________respectively," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Coleorhiza and Coleoptile**:
- Coleorhiza is a protective sheath that covers the radical (the embryonic root) in monocot seeds.
- Coleoptile is a protective sheath that covers the plumule (the embryonic shoot) in monocot seeds.

2. **Identifying the Structures**:
- The radical is the part of the seed that develops into the root system.
- The plumule is the part of the seed that develops into the shoot system.

3. **Matching the Terms**:
- Since coleorhiza covers the radical, we can fill in the first blank.
- Since coleoptile covers the plumule, we can fill in the second blank.

4. **Final Answer**:
- Therefore, the complete answer is: Coleorhiza and coleoptile are the protective sheaths covering **radical** and **plumule** respectively.

### Conclusion:
The correct answer is **radical** and **plumule**.