Biology, 05.11.2021 21:50, syd8152

Marine biologists are studying stickleback fish populations. There are two distinct variations in the sticklebacks based on phenotypes. They are found with the three spines more commonly in marine ecosystems while they are more commonly found without the three
spines in freshwater ecosystems. This has been observed in many marine and freshwater ecosystems across the globe. What explains
the variation seen in the image here across different aquatic ecosystems?

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Marine biologists are studying stickleback fish populations. There are two distinct variations in th...