What is true of Monophyllaea

Options

A. Presence of single leaf
B. One of the two cotylendone is shed
C. One cotyledon grows in size and remians functional throughout life
D. All the above.

Answer

### Step-by-Step Solution

1. **Understanding the Term "Monophyllaea":**
- The term "Monophyllaea" can be broken down into two parts: "mono" meaning one, and "phylla" meaning leaf. Therefore, Monophyllaea refers to plants that have a single leaf.

2. **Cotyledons in Monophyllaea:**
- In Monophyllaea plants, there are typically two cotyledons present initially. Cotyledons are the first leaves that develop from the embryo of a seed.
- However, in this case, one of the cotyledons will eventually shed and become non-functional.

3. **Functional Cotyledon:**
- The remaining cotyledon grows in size and remains functional throughout the plant's life. This means that it continues to provide nourishment to the plant as it grows.

4. **Conclusion:**
- Therefore, in Monophyllaea, it is true that there is one functional leaf (the remaining cotyledon) throughout the life of the plant, while the other cotyledon is shed.

5. **Correct Answer:**
- Based on the above points, all statements regarding Monophyllaea are correct, making option number four the right answer.