State major difference between maize grain and bean seed.

Explanation

### Step-by-Step Solution:

1. **Classification of Seeds**:
- **Maize Grain**: Maize is classified as a monocot seed. This means it has one cotyledon.
- **Bean Seed**: In contrast, the bean seed is classified as a dicot seed, which means it has two cotyledons.

2. **Presence of Endosperm**:
- **Maize Grain**: At maturity, the maize grain contains endosperm, which serves as a food reserve for the developing plant.
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