Which of the following monocotyledonous seeds is non-endospermic?

Options

A. Maize
B. Coconut
C. Orchid
D. Caster

Answer

To determine which monocotyledonous seed is non-endospermic, we need to understand the definitions and characteristics of endospermic and non-endospermic seeds.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Endospermic Seeds**: These seeds retain the endosperm during the development of the embryo. The endosperm serves as a food reserve for the developing seedling.
- **Non-Endospermic Seeds**: In these seeds, the endosperm is completely consumed by the time the seed matures, and the food reserves are stored in the cotyledons.

2. **Identify the General Characteristics of Monocots**:
- Most monocotyledonous seeds are typically endospermic. This means that in most cases, the endosperm remains present in the mature seed.

3. **Look for Exceptions**:
- While most monocots are endospermic, there are exceptions. One notable example of a non-endospermic monocot is the orchid seed.

4. **Select the Correct Answer**:
- Based on the information provided, the question asks for a monocotyledonous seed that is non-endospermic. The answer is **Orchid** (option number 3).

### Final Answer:
The monocotyledonous seed that is non-endospermic is **Orchid**.

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