• anonymous
A girl notices that her guppies reproduce most when her fish tank water is slightly alkaline. They stop reproducing if the water becomes acidic or if the water becomes too alkaline. This is an example of _____. *secondary succession *zones of tolerance and intolerance *communities *intertidal zones
  • Stacey Warren - Expert
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  • jamiebookeater
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  • blues
It's really helpful if you post up your hunch or what aspect of the problem you would like help with. Especially if you're posting more than one multiple choice problems. This problem is about what conditions the guppies can tolerate and which they can't, so the correct answer is "zones of tolerance and intolerance."

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