Answer:
A- soil bacteria converts usable nitrogen into nitrogen gas
A year
Every time the Earth revolves around the sun, a year has passed
A watershed is the drainage area of a landscape where water from rain or melting snow and ice drains downhill into a body of water such as a river, lake, reservoir, pond, estuary, wetland, aquifer, sea, or ocean.
Answer:
a
Explanation:
it's a I like chicken is that cool
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
