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1
Why would the process of secondary treatment preclude denitrification?
2
Which would be more likely to cause illness, a water sample that tested positive for coliforms or one that tested positive for E. coli O157:H7?
3
Developing plants that can take up and concentrate heavy metal pollutants in soil water is an active field of research. Would this approach effectively remove polluting metals from the environment?
4
How would adding a third chlorine atom to 2,4-D (figure 31.10) block the enzyme attack? (Hint: explain in terms of enzyme and substrate structure).







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