What shield-shaped single cotyledon of monocots is called?

Explanation

**Step-by-Step Solution:**

1. **Understanding Monocots**: Monocots, short for monocotyledons, are a group of flowering plants characterized by having a single cotyledon in their seeds. This is a key feature that distinguishes them from dicots, which have two cotyledons.

2. **Identifying Cotyledons**: Cotyledons are the first leaves that appear from a germinating seed. In monocots, there is only one cotyledon, which serves as a seed leaf and often stores nutrients for the developing plant.

3. **Structure of Monocot Embryo**: The monocot embryo has a specific structure where the single cotyledon is located on one side of the embryonal axis. This cotyledon is typically shield-shaped.

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