Item:
HSA 2006 Biology Item 12
- CID
- CIDbe14e6958b2eaf8d3924bf8cc5b75e5b
- itemNum
- 12
- initialLetter
- F
- itemType
- SR
- itemAnswerKey
- 3
- itemMaxScorePoints
- 1
- origNum
- x
Use the technical passage "The Good, The Bad, The Zebra Mussel" to answer the following:
Researchers believe that zebra mussels are ten times more effective in removing toxic contaminants like PCBs than are native mussels. Which of these experiments would test this hypothesis?
- Place 20 zebra mussels in a tank with PCBs and 20 zebra mussels in another tank without PCBs. Test PCB levels of each tank after one week.
- Place 20 zebra mussels in a tank with PCBs and 20 native mussels in another tank without PCBs. Test PCB levels of each tank after one week.
- Place 20 zebra mussels in a tank with PCBs and 20 native mussels in another tank with PCBs. Test PCB levels of each tank after one week.
- Place 20 native mussels in a tank with PCBs and 20 native mussels in a tank without PCBs. Test PCB levels of each tank after one week.
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