Question

q. 17 what is the proper sequence of how nitrogen is cycled in a fish tank? nitrite to nitrate, nitrate to ammonia, ammonia to nitrogen gas and leaves by diffusion ammonia to nitrogen gas, nitrogen gas to nitrate, nitrate to nitrite, nitrite is converted back into ammonia and leaves by diffusion fish excrete (poop) ammonia, ammonia to nitrate, nitrate to nitrite, nitrite to nitrogen - gas which is released by diffusion

Explanation:

In a fish - tank nitrogen cycle, fish excrete ammonia. Ammonia is first converted to nitrite by ammonia - oxidizing bacteria, then nitrite is converted to nitrate by nitrite - oxidizing bacteria. Eventually, denitrifying bacteria convert nitrate to nitrogen gas which is released by diffusion.

Answer:

Fish excrete (poop) Ammonia, Ammonia to Nitrite, Nitrite to Nitrate, Nitrate to Nitrogen gas which is released by diffusion