How much of the brain does the average human use

100%

Explanation:

we use out brain 100% of the time just at different times and in different areas but we use all 100% of our brains 100 % of the time.

depends where

on my head

yes

on my legs

yes

on my

arms

yesh

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.