. Botany for high schools and colleges. Botany. Fig. 27.—Diagram to show mode of fission of the apical cell, as seen from above. /, the cell A, B, C, divided by the partition 1 ; //, the same cell with a second par- tition, 2 ; ///, the same cell with a third partition, 3. lines, is first divided into two unequal portions by the parti- tion 1,1. ; next the larger portion of the divided cell is again divided by the partition 2, II. ; later, a third partition (3, III.) is formed, and so on. It is no- ticeable that in this case the partition always forms parallel to the oldest wall of the divid-
. Botany for high schools and colleges. Botany. Fig. 27.—Diagram to show mode of fission of the apical cell, as seen from above. /, the cell A, B, C, divided by the partition 1 ; //, the same cell with a second par- tition, 2 ; ///, the same cell with a third partition, 3. lines, is first divided into two unequal portions by the parti- tion 1,1. ; next the larger portion of the divided cell is again divided by the partition 2, II. ; later, a third partition (3, III.) is formed, and so on. It is no- ticeable that in this case the partition always forms parallel to the oldest wall of the divid- ing cell. By continued growth the apical cell retains, despite its repeated divisions, its origi- nal dimensions. 50.—The growing cells of the stem of the English bean ( Yicia faha) furnish a good illustration of fission in the highest plants. In this case, and in many other, if not all. Dicotyledons, the division takes place directly of the stem through the centrally placed of Baa/a6a, m process of fission; m » J r the cells a, a, the process is in its nuclCUS ia, Hlff. 28). Alter the earlier stage; at 6 it is completed. X„ ,-pri n i 300.—After Pranti. lormatio*! 01 the ncw wall each new nucleus ndoves away and occupies a position on the opposite side of the cell from where it was formed (as at h and h).. 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 Bessey, Charles Edwin, 1845- [from old catalog]. New York, H. Holt and company
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