Sharks and dolphins are similar in appearance because of

Options

A. convergent evolution
B. common ancestry
C. Divergent evolution
D. asexual reproduction

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: We are comparing sharks and dolphins, which are two different types of animals. Sharks are fish, while dolphins are mammals.

2. **Recognize the Similarities**: Despite being from different classes of animals, sharks and dolphins share similar physical features, such as streamlined bodies and fins.

3. **Understand the Concept of Evolution**: Evolution refers to the process through which species change over time. There are different types of evolutionary processes, one of which is convergent evolution.

4. **Define Convergent Evolution**: Convergent evolution occurs when unrelated species develop similar traits or adaptations in response to similar environmental pressures or ecological niches, even though they do not share a recent common ancestor.

5. **Apply the Concept**: In the case of sharks and dolphins, both have adapted to living in aquatic environments, which has led to the development of similar body shapes and features that enhance their swimming efficiency. However, they do not share a close common ancestor that accounts for these similarities.

6. **Conclusion**: The similarity in appearance between sharks and dolphins is a result of convergent evolution, where different species evolve similar traits independently due to similar environmental challenges.

**Final Answer**: Sharks and dolphins are similar in appearance because of convergent evolution.

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