HSA 2006 Biology Item 12print

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?

  1. 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.
  2. 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.
  3. 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.
  4. 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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