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 comprise the greatest mass of living substance (biomass) in a terrestrial food chain
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 Producers (e.g., grasses). Organisms that comprise the greatest biomass in a terrestrial food chain are the producers. Net productivity (photosynthesis minus respiration) creates biomass.