The ploidy level is not the same in:

Options

A. Integument and nucellus
B. Root tip and shoot tip
C. Secondary nucleus and endosperm
D. Antipodals and synergids

Answer

To solve the question regarding the ploidy levels that are not the same, we will analyze the options provided and determine their respective ploidy levels.

### Step-by-Step Solution:

1. **Understanding Ploidy Level**:
- Ploidy refers to the number of sets of chromosomes in a cell. Common ploidy levels include:
- **Haploid (N)**: One set of chromosomes.
- **Diploid (2N)**: Two sets of chromosomes.
- **Triploid (3N)**: Three sets of chromosomes.

2. **Analyzing the Options**:
- **Option A: Integument**:
- The integument is the outer covering of the ovule in flowering plants. It is derived from the diploid sporophyte generation.
- **Ploidy Level**: 2N (Diploid).

- **Option B: Nucellus**:
- The nucellus is the central part of the ovule and is also diploid.
- **Ploidy Level**: 2N (Diploid).

- **Option C: Root Tip and Shoot Tip**:
- Both root tips and shoot tips arise from the meristematic tissues of the plant, which are also diploid.
- **Ploidy Level**: 2N (Diploid).

- **Option D: Secondary Nucleus and Endosperm**:
- The secondary nucleus is formed from the fusion of two polar nuclei within the embryo sac, making it diploid.
- **Ploidy Level**: 2N (Diploid).
- The endosperm is formed when a male gamete (haploid, N) fuses with the secondary nucleus (diploid, 2N), resulting in a triploid structure.
- **Ploidy Level**: 3N (Triploid).

3. **Conclusion**:
- The only pair of structures that have different ploidy levels is the **secondary nucleus (2N)** and the **endosperm (3N)**. Therefore, the answer to the question is:

**Answer: Secondary nucleus and endosperm.**