. The biology of Stentor. Stentor. 200 THE BIOLOGY OF STENTOR. Fig. 55, Observations concerning polarity. A. Heteromorphic specimen from abortive fission of a divider grafted to a regenerator, showing tendency toward resorption of conflicting part. B. Heteromorph with continuous striping and therefore reversed asymmetry in the smaller part, consequence of hetero- polar implant (later separating) which set up a secondary polar axis. C. When major portion of stentor is reversed (head and tail trade places) all parts retain their polarities and mid-portion regenerates separate head (x) and tail (
. The biology of Stentor. Stentor. 200 THE BIOLOGY OF STENTOR. Fig. 55, Observations concerning polarity. A. Heteromorphic specimen from abortive fission of a divider grafted to a regenerator, showing tendency toward resorption of conflicting part. B. Heteromorph with continuous striping and therefore reversed asymmetry in the smaller part, consequence of hetero- polar implant (later separating) which set up a secondary polar axis. C. When major portion of stentor is reversed (head and tail trade places) all parts retain their polarities and mid-portion regenerates separate head (x) and tail (3;). D. Head excised and grafted to replace tail at posterior end does not reverse the cell polarity nor prevent regeneration of the "host" but organizes a new individuality. the center of organization and growth of a secondary cell shape (Fig. 55D). From the standpoint of oral inhibition these cases were also interesting as showing that a displaced set of intact feeding organelles can much delay primordiiim formation but not prevent it entirely. All these experiments so attest the fixity of polarity in every part of the cortex that one wonders whether reversal of polarity is ever possible. It would seem that the best place to look for such 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 Tartar, Vance, 1911-. New York, Pergammon Press
Size: 1892px × 1321px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
