. Elementary biology; an introduction to the science of life . ^ ^^^.^ Fig. 12. Sand dunes at Pine, Indiana The roots and underground stems of the grass Calamovilfa Inm^ifolia bind together the grains of sand, gradually leading to the formation of larger and larger soil masses. Barren sand is blown about by the winds. (From photograph by Dr. George D. Fuller) This can be seen in the flow of sap, as when the sugar maples are tapped for sirup in the spring, and it can also be shown experimentally. 72. Uses of roots. It is because of the habit of depositing food in their roots that many plants ar
. Elementary biology; an introduction to the science of life . ^ ^^^.^ Fig. 12. Sand dunes at Pine, Indiana The roots and underground stems of the grass Calamovilfa Inm^ifolia bind together the grains of sand, gradually leading to the formation of larger and larger soil masses. Barren sand is blown about by the winds. (From photograph by Dr. George D. Fuller) This can be seen in the flow of sap, as when the sugar maples are tapped for sirup in the spring, and it can also be shown experimentally. 72. Uses of roots. It is because of the habit of depositing food in their roots that many plants are of especial interest to us. Our common vegetable roots can be shown to contain a great deal of food, such as starch, sugar, and proteins. Although our fleshy vegetables contain from about 8o per cent to 90 per cent of water after the skin is removed, they are still worth
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