Answer: a) plasma membrane
Explanation:
Explanation:
the body regulates glucose levels through the pancreas. the pancreas secretes insulin, which in turn regulate glucose levels..
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.
I think its oxygen hope this helps
