File:Aphis rosae segmentation.jpg
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[edit]DescriptionAphis rosae segmentation.jpg | FIG. 57. SEGMENTATION OF APHIS ROSAE. (Copied from Metschnikoff.) In all the stages there is seen to be a central yolk mass surrounded by a layer of protoplasm. In this protoplasm two nuclei have appeared in 1, four nuclei in 2. In 3 the nuclei have arranged themselves regularly, and in 4 the protoplasm has become divided into a number of columnar cells corresponding to the nuclei. w. pole of the blastoderm which has no share in forming the embryo |
Date | |
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https://archive.org/details/theworks02balfuoft/page/116/mode/2up?view=theater&q=blastoderm THE WORKS OF FRANCIS MAITLAND BALFOUR VOL. III A TREATISE ON COMPARATIVE EMBRYOLOGY. |
Author | M. FOSTER, F.R.S., ADAM SEDGWICK, M.A., |
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current | 22:34, 29 February 2024 | ![]() | 935 × 387 (345 KB) | Rasbak (talk | contribs) | {{Information |description=FIG. 57. SEGMENTATION OF APHIS ROSAE. (Copied from Metschnikoff.) In all the stages there is seen to be a central yolk mass surrounded by a layer of protoplasm. In this protoplasm two nuclei have appeared in 1, four nuclei in 2. In 3 the nuclei have arranged themselves regularly, and in 4 the protoplasm has become divided into a number of columnar cells corresponding to the nuclei. w. pole of the blastoderm which has no share in forming the embryo |source=https://ar... |
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