Why do different animal species have similar anatomical structures?
In: Biology
Convergent evolution. The animals with the best designed bodies are most likely to survive long enough to breed and pass on their genetics.
An example is ichthyosaurs, sharks and dolphins. All are built very similarly but they’re not related. They’re a reptile, fish and mammal respectively. But that design is great for streamlined swimming and attacking the prey they do. So the animals with those features naturally survived more than those without if their niche was eating the same fish sharks and dolphins do.
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