Answered: Tropical rainforest covers only about…

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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Tropical rainforest covers only about 3% of earth's surface, but they are estimated to be responsible for more than 20% of global photosynthesis. For this reason, rainforests are often referred to as the “lungs' ' of the planet, providing O2 for life all over earth. However, most experts believe that rainforests make little or no net contribution to global O2 production. From your knowledge of photosynthesis and cellular respiration, can you explain why they might think this? ( Hint: what happens to the energy stored as sugars in the body of a plant when that plant dies or parts of it are eaten by animals?)

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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