Perisperm is

Options

A. degenerate part of synergids
B. peripheral part of endosperm
C. degenerate part of secondary nucleus
D. remnant of nucellus

Answer

To solve the question "Perisperm is:", we need to analyze each of the given options and understand the definition of perisperm.

### Step-by-Step Solution:

1. **Understand the Definition of Perisperm**:
- Perisperm is a tissue that provides nourishment to the developing embryo in certain seeds. It is derived from the nucellus, which is the central part of the ovule.

2. **Analyze the Options**:
- **Option A: Degenerate part of Synergid**: This is incorrect. Synergids are part of the female gametophyte and do not relate to perisperm.
- **Option B: Peripheral part of Endosperm**: This is also incorrect. The endosperm is a separate tissue that nourishes the embryo but is not the same as perisperm.
- **Option C: Degenerate part of Secondary Nucleus**: This option is incorrect as well. The secondary nucleus contributes to the formation of endosperm, not perisperm.
- **Option D: Remnant of Nucleus**: This is the correct answer. Perisperm is indeed the remnant of the nucellus, which persists in some seeds and provides nourishment.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option D: Remnant of Nucleus**.

### Final Answer:
Perisperm is the remnant of the nucellus.

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