Multiple choice Carnivores get the majority of their usable nitrogen compounds by extracting them from the air they breathe nurturing nitrogen fixing bacteria in their guts eating herbivores and other carnivores Breathing in air after a lightning storm Reveal answer Fill a bubble to check yourself C Correct answer Explanation Carnivores cannot fix atmospheric nitrogen or synthesize it from the air. They obtain necessary nitrogen compounds by consuming other organisms that have already incorporated nitrogen into their tissues.