Which type of organism in this lab can get its nitrogen from nitrogen fixation (converting N2 gas into ammonia), allowing it to grow even if easily used forms of nitrogen are not available in its water or food? Cyanobacteria

Daphnia

Bosmina

Trout

Cyanobacteria

Explanation:

Cyanobacteria are group of bacteria; some of which undergo photosynthesis, and some undergo nitrogen fixation, as a source of energy for metabolic processes. The nitrogen fixing bacteria can fix atmospheric nitrogen in anaerobic conditions by means of specialized cells called heterocysts.

Various species of these cyanobacteria can be unicellular, filamentous and can even exist as a colony. Colonies may exist as filaments, sheets, or even hollow spheres.