What would happen to the nitrogen cycle if bacteria was no longer present

Without bacteria around to break down biological waste, it would build up. And dead organisms wouldn't return their nutrients back to the system.

Explanation:

The simplest way to explain it is:

Without bacteria, the nitrogen cycle would stop. Bacteria is responsible for converting ammonia into nitrogen.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem