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The conversion of nitrate (NO3-) to nitrogen gas (N2) is called ______.
Q5: An ecosystem consists of<br>A) a physical environment
Q6: Which of the following is not a
Q7: Subacute sclerosing panencephalitis is caused by a
Q11: What gas is released in the process
Q24: What is the dependency ratio?<br>A) the number
Q29: The layer of soil that is a
Q57: The key characteristic of the herpes family
Q62: Respiratory syncytial virus<br>A)causes serious disease in infants
Q72: Which is not a characteristic of Helicobacter
Q85: Which of the following respiratory tract defenses