Which lipid does not contain at least some subunits similar to those in the others?

Options

A. Steroids
B. Neutral fats
C. Waxes
D. Phospholipids

Explanation

### Step-by-Step Solution:

1. **Understanding Lipids**:
- Lipids are a diverse group of hydrophobic (water-repelling) molecules that are insoluble in water. They include various types such as fats, oils, waxes, and steroids.

2. **Identifying the Types of Lipids**:
- The question presents several types of lipids: steroids, neutral fats (triglycerides), waxes, and phospholipids. We need to analyze their structures to determine which one does not share subunits with the others.

3. **Analyzing Steroids**:
- Steroids have a unique structure characterized by four fused carbon rings. This structure is distinct and does not resemble the structures of other lipid types.

4. **Analyzing Neutral Fats**:
- Neutral fats (triglycerides) are composed of one glycerol molecule and three fatty acids. This structure is common among many lipids.

5. **Analyzing Waxes**:
- Waxes are simple lipids that are typically esters of long-chain fatty acids and long-chain alcohols. They also share similarities with other lipid structures.

6. **Analyzing Phospholipids**:
- Phospholipids are modified triglycerides that contain a phosphate group in place of one of the fatty acids. They also share structural similarities with other lipids.

7. **Conclusion**:
- Among the lipids listed, steroids are the only type that does not contain subunits similar to those found in neutral fats, waxes, or phospholipids. Therefore, the correct answer is **steroids**.

### Final Answer:
The lipid that does not contain at least some subunits similar to those in the others is **steroids**.

---