. Biology; the story of living things. THE DISPLAY OF ENERGY .17:} of position in space when they come to rest on the sensory hairs which Hue tiie httle pits, or otocysts. A somewhat similar explanation has been advanced to account for the response to gravity in plants. Cells of plants are filled with fluid, but they also have in them various solid bodies, some of which are starch grains, and others tiny crys- tals of calcium oxalate, or other minerals. It is thought that the movement of these bodies within the cell may give the stimulus for the turning movements attributed to gravity. The twi
. Biology; the story of living things. THE DISPLAY OF ENERGY .17:} of position in space when they come to rest on the sensory hairs which Hue tiie httle pits, or otocysts. A somewhat similar explanation has been advanced to account for the response to gravity in plants. Cells of plants are filled with fluid, but they also have in them various solid bodies, some of which are starch grains, and others tiny crys- tals of calcium oxalate, or other minerals. It is thought that the movement of these bodies within the cell may give the stimulus for the turning movements attributed to gravity. The twining move- ment and spiral growth of stems also seems to be related to the stimulus of gravity, for if such plants are placed on a rotating clinostat, the twining movement ceases. There are many other kinds of responses, but the mechanism of the response is not always clear. Roots travel for long distances toward a source of water. A case is cited in California of a eucalyptus tree which sent out its roots over 100 feet underneath a boulevard, the fine roots ultimately clogging a cement water pipe on the other side. Perceptive region of Roripa amphibia; of the granules in Nemec.) in the root cap with the position the cells. (After ^^v^^^^^^ Q " 1^ H â mkM 1. 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 Hunter, George W. (George William), 1873-1948; Walter, Herbert Eugene, b. 1867; Hunter, George W. (George William), 1902-. New York, Cincinnati [etc. ] American book company
Size: 1707px × 1463px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorwalterherberteugeneb1867, bookcentury1900, bookpublish
