Zebra mussels are filter feeders that cleanse freshwater lakes and therefore have helped increase the populations of smallmouth bass. Zebra mussel populations grow at an alarmingly fast rate, often dominating ecosystems to the detriment of other organisms. What does the second sentence do?

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Zebra mussels are filter feeders that cleanse freshwater lakes and therefore have helped increase the populations of smallmouth bass. Zebra mussel populations grow at an alarmingly fast rate, often dominating ecosystems to the detriment of other organisms. What does the second sentence do?






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