Question:
Convergent evolution is demonstrated by which of the following?
Convergent evolution is demonstrated by which of the following?
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Convergent evolution occurs when unrelated species develop similar traits independently due to similar environmental pressures.
Updated On: Sep 13, 2025
- Bacteria and protozoa
- Rat and dog
- Starfish and cuttle fish
- Dogfish and whale
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The Correct Option is D
Solution and Explanation
Step 1: Define convergent evolution.
Convergent evolution refers to the process where organisms that are not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.
Step 2: Review the options.
- Bacteria and protozoa are not an example of convergent evolution; they are unrelated and very different organisms. - Rat and dog, though different, share similarities, but not due to convergent evolution. They belong to the same class (mammals) and share a common ancestor. - Starfish and cuttlefish are from completely different phyla, and although they have similar features, they do not exhibit convergent evolution in the strictest sense. - Dogfish and whale are examples of convergent evolution; despite their different evolutionary paths, they both have a streamlined body and fins adapted for swimming in water due to similar environmental pressures.
Step 3: Conclude.
The correct answer is (D), as dogfish and whale exhibit convergent evolution by developing similar traits independently in response to similar environmental pressures.
Final Answer: \[ \boxed{\text{Dogfish and whale}} \]
Convergent evolution refers to the process where organisms that are not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.
Step 2: Review the options.
- Bacteria and protozoa are not an example of convergent evolution; they are unrelated and very different organisms. - Rat and dog, though different, share similarities, but not due to convergent evolution. They belong to the same class (mammals) and share a common ancestor. - Starfish and cuttlefish are from completely different phyla, and although they have similar features, they do not exhibit convergent evolution in the strictest sense. - Dogfish and whale are examples of convergent evolution; despite their different evolutionary paths, they both have a streamlined body and fins adapted for swimming in water due to similar environmental pressures.
Step 3: Conclude.
The correct answer is (D), as dogfish and whale exhibit convergent evolution by developing similar traits independently in response to similar environmental pressures.
Final Answer: \[ \boxed{\text{Dogfish and whale}} \]
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