The first items in the Biology E/M test are arranged in sets with common answer choices. These items appear in the core section of the test. Remember, these are not MATCHING challenges — each answer choice can be used once, more than once, or not at all.
Organisms that convert nitrogen-containing organic molecules into nitrates
Select an Answer
Decomposers (e.g., bacteria)
Producers (e.g., grasses)
Primary consumers (e.g., mice)
Secondary consumers (e.g., snakes)
Tertiary consumers (e.g., hawks)
The correct answer is Decomposers (e.g., bacteria). Of the list of organisms given, decomposer bacteria are the only ones that can convert nitrogen-containing organic molecules into ammonia. Ammonia, which is a form of nitrogen-containing molecule, is subsequently converted to nitrate that plants can use to synthesize new organic compounds with nitrifying bacteria.