At which stage one can distinguish between nuclear and cellular type of endosperm?

Options

A. When divisions start in embryo
B. When embryo is heart-shaped
C. Just after division of primary endosperm nucleus
D. Mature stage of endosperm

Answer

To determine at which stage one can distinguish between nuclear and cellular types of endosperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Endosperm Formation**:
- Endosperm is the tissue that provides nourishment to the developing embryo in flowering plants. It is typically triploid and undergoes several divisions.

2. **Types of Endosperm**:
- There are three main types of endosperm formation: nuclear, cellular, and halobium.
- **Nuclear Endosperm**: In this type, repeated divisions occur without the formation of cell walls, leading to a multinucleate condition.
- **Cellular Endosperm**: In this type, nuclear divisions occur along with the formation of cell walls, resulting in distinct cells.

3. **Identify the Key Difference**:
- The primary distinction between nuclear and cellular endosperm lies in the presence or absence of cell walls during the division of the endosperm nucleus.

4. **Consider the Stages of Division**:
- The question asks at which stage one can distinguish between the two types of endosperm.
- The first division of the primary endosperm nucleus is crucial, as it is at this point that the differences in division types become apparent.

5. **Conclusion**:
- The correct answer to the question is that one can distinguish between nuclear and cellular types of endosperm just after the division of the primary endosperm nucleus. This is when the characteristics of each type become evident.

### Final Answer:
One can distinguish between nuclear and cellular types of endosperm just after the division of the primary endosperm nucleus.

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