The similarity of bone structure in the forelimbs of many vertebrates is an example of:

Options

A. Homology
B. Analogy
C. Convergent evolution
D. Adaptive radiation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the similarity of bone structures in the forelimbs of various vertebrates. We need to identify what this similarity represents in biological terms.

2. **Identifying Key Terms**: The key terms in the question are "similarity," "bone structure," and "forelimbs of vertebrates." We need to analyze these terms to understand the underlying concept.

3. **Analyzing Bone Structures**: The forelimbs of vertebrates such as humans, whales, bats, and birds have a similar arrangement of bones (humerus, radius, ulna, etc.). This similarity suggests a common structural pattern.

4. **Understanding Homologous Structures**: Homologous structures are anatomical features in different species that share a common ancestry, even if their functions may differ. In this case, the forelimbs of vertebrates are homologous because they have a similar structure derived from a common ancestor.

5. **Differentiating from Analogous Structures**: It’s important to distinguish between homologous and analogous structures. Analogous structures arise in different species due to convergent evolution and serve similar functions but do not share a common ancestry. The forelimbs of vertebrates do not fit this description.

6. **Conclusion**: Since the forelimbs of vertebrates have similar structures but different functions, they are classified as homologous structures. Therefore, the answer to the question is **Homology**.

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