. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. FiG. 4. — Diagram indicating the different stages of maturation attained by the eggs of various animals before the sperm enters. A, Nereis, Tlialassema; B, Chaetopterus and some other marine annelids; C, frog, Axolotl, lamprey ; D, sea-urchin. phase, if the egg is left unfertilized in sea-water; and the same appears to be true of many other marine annelids. This elab- orate machinery of mitotic division is immediately set in motion upon the entrance of the spermatozoon, though the sperm and its c
. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. FiG. 4. — Diagram indicating the different stages of maturation attained by the eggs of various animals before the sperm enters. A, Nereis, Tlialassema; B, Chaetopterus and some other marine annelids; C, frog, Axolotl, lamprey ; D, sea-urchin. phase, if the egg is left unfertilized in sea-water; and the same appears to be true of many other marine annelids. This elab- orate machinery of mitotic division is immediately set in motion upon the entrance of the spermatozoon, though the sperm and its centrosomes are in a distant portion of the egg. All the phases of this and the subsequent mitosis are inde- pendent of the karyokinetic changes in the vicinity of the sperm. Since in one form the oocyte will not divide until the sperm enters the cell, even though the centrosomes and the whole. 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 Marine Biological Laboratory (Woods Hole, Mass. ). Boston, Ginn & Co
Size: 1464px × 1707px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectbiology
