Cells of poikilothermic (cold blooded) animals usually have a higher proportion of unsaturated fatty acids than homeothermic (warm-blooded) animals. Can you account for this?

Explanation

### Step-by-Step Solution:

1. **Understanding Poikilothermic and Homeothermic Animals**:
- Poikilothermic animals, also known as cold-blooded animals, cannot regulate their body temperature internally and rely on external environmental temperatures.
- Homeothermic animals, or warm-blooded animals, maintain a constant internal body temperature regardless of external conditions.

2. **Role of Fatty Acids in Cell Membranes**:
- Cell membranes are composed of phospholipids, which include fatty acids. The nature of these fatty acids (saturated vs. unsaturated) affects the fluidity of the membrane.
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