The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase over the years. the unionid mussel population decreased because of lack of food.
Answer from: Quest
Don’t know. don’t care.look it up on google
Answer from: Quest
The answer is: [d]: "ultraviolet" {" uv "} .
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