. Textbook of botany. Botany. 2SO TEXTBOOK OF BOTANY influence upon the air, and the members of each group supply the particular gas that the members of the other group need. During a bright day, green plants give off more oxygen to the air than they take in, because carbohydrate manufacture goes on then much more rapidly than respiration. During the night, green plants respire, but do not make carbo- hydrates ; therefore, they take oxygen from the air and give off carbon dioxid. 262. Movements of Leaves: The Sensitive Plant. — If we turn a leaf until its lower surface is upward and its upper.
. Textbook of botany. Botany. 2SO TEXTBOOK OF BOTANY influence upon the air, and the members of each group supply the particular gas that the members of the other group need. During a bright day, green plants give off more oxygen to the air than they take in, because carbohydrate manufacture goes on then much more rapidly than respiration. During the night, green plants respire, but do not make carbo- hydrates ; therefore, they take oxygen from the air and give off carbon dioxid. 262. Movements of Leaves: The Sensitive Plant. — If we turn a leaf until its lower surface is upward and its upper. Fig. 148. — A, a sensitive plant whose leaves are in the ordinary expanded condition. B, the same plant, after its leaves and leaflets have responded to the stimulus of a blow. surface downward, and fasten it in the new position, we shall find that in the course of some hours it has turned (usually by a twisting of the leaf-stalk) until the leaf-blade faces in the same direction as before. This is one of the ways in which leaves can adjust their position in relation to light. A differ- ent and more rapid sort of leaf movement is seen in certain plants, one of which is the familiar " sensitive ; This plant, like the bean, is a member of the pulse family; it is a. 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 Allen, Charles E. (Charles Elmer), b. 1872; Gilbert, Edward Martinius, joint author. Boston, New York [etc. ] D. C. Heath & co
Size: 2100px × 1190px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1917
