Which of the following set is not an example of divergent evolution?

Options

A. Vertebrate hearts or brains
B. Marsupials and Darwin finches
C. Sweet potato and potato
D. Forelimbs of vertebrates

Answer

To determine which of the following sets is not an example of divergent evolution, we first need to understand the concepts of divergent and convergent evolution.

### Step-by-Step Solution:

1. **Define Divergent Evolution**:
- Divergent evolution occurs when two or more related species become more dissimilar over time, often due to different environments or functions. They share a common ancestor but develop different traits and functions.

2. **Define Convergent Evolution**:
- Convergent evolution happens when unrelated species develop similar traits or functions due to similar environmental pressures, despite having different evolutionary origins.

3. **Analyze the Options**:
- **Option A: Vertebrate heart or brain**:
- These organs have a common evolutionary origin (vertebrates) but perform different functions (circulation vs. processing information). This is an example of divergent evolution.

- **Option B: Marsupials and Darwin finches**:
- Both groups have evolved from a common ancestor but have adapted to different environments and functions. This is also an example of divergent evolution.

- **Option C: Sweet potato and potato**:
- Both sweet potato and potato are used for storage (similar function) but come from different plant families. Since they have similar functions, this is an example of convergent evolution.

- **Option D: Forelimb of vertebrates**:
- The forelimbs of various vertebrates (like humans, whales, and bats) have a common origin but have adapted to different functions (manipulation, swimming, flying). This is an example of divergent evolution.

4. **Conclusion**:
- The only option that does not represent divergent evolution is **Option C: Sweet potato and potato**, as they exhibit convergent evolution due to their similar function of storage.

### Final Answer:
**Option C: Sweet potato and potato** is not an example of divergent evolution.

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