. Animal biology; Human biology. Parts II & III of First course in biology. Biology. THE PRINCIPLES OF BIOLOGY into organic substances. The oxygen of the carbon dioxid is set free and returns to the air (Fig. 2). Starch, sugar, oil, and woody fiber are examples of substances thus formed. Can you think of any fuel not due to plants ? How Animals obtain Energy. — You have noticed that starch, oil, etc., will burn, or oxidize-, that is, unite with the oxygen of the air; thus the sun's energy, stored in these substances, is changed back to heat and motion. The oxidation of oil or sugar may occ
. Animal biology; Human biology. Parts II & III of First course in biology. Biology. THE PRINCIPLES OF BIOLOGY into organic substances. The oxygen of the carbon dioxid is set free and returns to the air (Fig. 2). Starch, sugar, oil, and woody fiber are examples of substances thus formed. Can you think of any fuel not due to plants ? How Animals obtain Energy. — You have noticed that starch, oil, etc., will burn, or oxidize-, that is, unite with the oxygen of the air; thus the sun's energy, stored in these substances, is changed back to heat and motion. The oxidation of oil or sugar may occur in a furnace; it may also occur in the living substance of the active Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan Co.
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