![Text-book of botany, morphological and physiological . Fig 346.—-4 pollen-sa: of Althaa rosea seen from the side; B transverse section of an anther-lobe showing thetwo pollen-sacs, m the mother-cells of the pollen, Text-book of botany, morphological and physiological . Fig 346.—-4 pollen-sa: of Althaa rosea seen from the side; B transverse section of an anther-lobe showing thetwo pollen-sacs, m the mother-cells of the pollen,](https://c8.alamy.com/comp/2AWRMG9/text-book-of-botany-morphological-and-physiological-fig-346-4-pollen-sa-of-althaa-rosea-seen-from-the-side-b-transverse-section-of-an-anther-lobe-showing-thetwo-pollen-sacs-m-the-mother-cells-of-the-pollen-in-a-still-united-into-a-tissue-in-5-already-divided-each-into-four-pollen-cells-n-the-epithelium-of-the-pollen-sac-each-anther-lobe-consisting-of-two-pollen-sacs-is-here-borne-ona-long-branch-of-the-filament-period-into-a-delicate-thin-walled-epithelium-ep-filled-with-coarse-grained-protoplasmthe-cells-of-which-usually-divide-radially-and-elongate-but-are-afterwards-de-2AWRMG9.jpg)
Text-book of botany, morphological and physiological . Fig 346.—-4 pollen-sa: of Althaa rosea seen from the side; B transverse section of an anther-lobe showing thetwo pollen-sacs, m the mother-cells of the pollen,
![Botany for agricultural students. Plants. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsponingia), usually four in number, joined into the struc- ture called anther. The pollen grains ( Botany for agricultural students. Plants. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsponingia), usually four in number, joined into the struc- ture called anther. The pollen grains (](https://c8.alamy.com/comp/RH8HEY/botany-for-agricultural-students-plants-stamen-461-stamen-the-stamen-microsporophyll-has-its-pollen-sacs-microsponingia-usually-four-in-number-joined-into-the-struc-ture-called-anther-the-pollen-grains-microspores-are-numer-ous-in-each-sac-and-are-formed-before-the-flower-opens-like-the-spores-of-gymnosperms-pteridophytes-and-bryophytes-they-are-formed-by-special-cells-known-as-mother-cells-of-which-there-are-many-in-each-pollen-sac-as-shown-at-a-in-figure-408-these-mother-cells-also-divide-by-the-reduction-division-that-is-by-the-kind-of-cell-division-in-which-the-dau-RH8HEY.jpg)
Botany for agricultural students. Plants. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsponingia), usually four in number, joined into the struc- ture called anther. The pollen grains (
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![Wolf spiderd are excellent mothers! Female wolf spiders their egg sacs around on their backs. When the young hatch they hitch a ride on her for a few days before ballooning off Wolf spiderd are excellent mothers! Female wolf spiders their egg sacs around on their backs. When the young hatch they hitch a ride on her for a few days before ballooning off](https://i.redd.it/t01bm9pbdu221.jpg)
Wolf spiderd are excellent mothers! Female wolf spiders their egg sacs around on their backs. When the young hatch they hitch a ride on her for a few days before ballooning off
![Lilium bud - pollen sac with tapedum and microspore mother cells in Interphase - UWDC - UW-Madison Libraries Lilium bud - pollen sac with tapedum and microspore mother cells in Interphase - UWDC - UW-Madison Libraries](https://asset.library.wisc.edu/1711.dl/LBOLC4KK3IPJS9E/M/h1380-44556.jpg)
Lilium bud - pollen sac with tapedum and microspore mother cells in Interphase - UWDC - UW-Madison Libraries
![Spider And Cocoons On The Asbestos Background. The Female Spider Guards Its Egg Sacs. Spider Mother Close Up Stock Photo, Picture And Royalty Free Image. Image 127067873. Spider And Cocoons On The Asbestos Background. The Female Spider Guards Its Egg Sacs. Spider Mother Close Up Stock Photo, Picture And Royalty Free Image. Image 127067873.](https://previews.123rf.com/images/donikz/donikz1907/donikz190700390/127067873-spider-and-cocoons-on-the-asbestos-background-the-female-spider-guards-its-egg-sacs-spider-mother.jpg)