The nitrogen cycle could not exist without

rhizobium

Explanation:

because the rhizobium helps in fixation of nitrogen in soil which is essential for plants so the nitrogen cycle would come to a standstill

do yall know the answer?

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!