Aleurone layer of maize seed stores _____ and is _____ in ploidy.

Options

A. Proteins , n
B. Cellulose, 2n
C. Proteins,3n
D. Fat,3n

Answer

To answer the question regarding the aleurone layer of maize seed, we will break it down into steps:

### Step-by-Step Solution:

1. **Understanding the Aleurone Layer**:
- The aleurone layer is the outermost layer of the endosperm in maize seeds.
- It is formed as a result of double fertilization, which is a key process in angiosperms.

2. **Identifying What is Stored**:
- The aleurone layer is known to contain aleurone grains, which are primarily rich in proteins.
- Therefore, the first blank in the question can be filled with "proteins".

3. **Determining the Ploidy Level**:
- The endosperm, including the aleurone layer, is triploid (3n) in ploidy because it is formed from the fusion of one sperm nucleus with two polar nuclei during double fertilization.
- Thus, the second blank in the question can be filled with "triploid".

4. **Final Answer**:
- The aleurone layer of maize seed stores **proteins** and is **triploid** in ploidy.

### Conclusion:
The correct answer is: "The aleurone layer of maize seed stores proteins and is triploid in ploidy."

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