Biology
N2 content is kept constant in the biosphere due to

absorption of N2
industrial pollution
nitrogen cycle
N2 fixation

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Biology
Which of the following statements is not true about metabolism?

Basal metabolism is measured by the amount of calories burned when your body is inactive
Basal metabolism is the amount of energy needed for sustaining life
Younger people generally have a slower metabolism than adults
Metabolism is influenced by numerous factors, such as heredity and age

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