Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What form of nitrogen is required by plants? By animals?
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Introduction :
The atmosphere has about 78% of nitrogen which is the ultimate source of it. Nitrogen is required organisms to synthesise proteins, nitric acids and other nitrogenous compounds. It is the most abundant gas. This is chemically inert and cannot be used as such by majority of organisms.
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