How To Use Chalaza In A Sentence
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The yolk with is attached embryo is suspended in the center of the egg shell by thick spiral fibers of the albumen called chalazae.
CreationWiki - Recent changes [en]
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Except at the crease, the endosperm is encased in the testa with its inner and outer cuticular layers and so, from this stage onwards, only the symplastic pathway through the chalazal cells is available.
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In sections of caryopses, greenish yellow fluorescence was observed in the cell walls of the chalaza and the outer layers of the nucellar projection.
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The relationship between the timing of these changes in the cytochemistry of the chalazal cells and the timing of the changes in grain water content and grain dry weight which occur during grain development has not been established.
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No changes in the staining of chalazal cell walls were detected at the end of grain filling.
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In two ovules there was an odd appearance, as if the outer coat of ovule at the chalaza end (if I understand the ovule) had naturally opened or withered where most of the pollen-tubes seemed to penetrate, which made me at first think this was a widely open foramen.
More Letters of Charles Darwin — Volume 2
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It is, furthermore, the case that the embryo sac itself also exhibits polar organization, with the egg cell and synergids adjacent to the micropyle, while the antipodal cells are found at the opposite chalazal end.
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But here is an odd thing: they never once enter at (what I suppose to be) the "orifice," but generally at the chalaza ...
More Letters of Charles Darwin — Volume 2
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Note the chalazal vascular bundle that encircles about three-quarters of the seed and the two short side branches that contain phloem only.
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The stalk is usually longer, the chalazal scar larger and often oval in outline, and the grooves on the back of the pip parallel to each other.
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At either end of the yolk (Figure 1, y.) twisted strands of albuminous matter, the chalazae (ch.) keep the yolk in place.
Text Book of Biology, Part 1: Vertebrata
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The egg yolk is suspended in the egg white known more formally as albumen or ovalbumin by one or two spiral bands of tissue called the chalazae.
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The chalaza in a duck egg is not as noticeable as it is in a chicken egg and the white is more transparent with less yellow coloring.
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In adventitious embryony, the embryo develops directly from nucellar or chalazal tissue without an intervening gametophyte stage.
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Less coherent expression was detected in the endodermis of the root elongation zone, in the stem of the young inflorescence, pollen tubes, base of axillary buds, ovules, chalazal endosperm, and fruit abscission zone.
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In wheat, evidence was found that a barrier occurred in the chalaza, a small zone of cells between the maternal vascular tissue and the nucellus.
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The egg yolk is suspended in the egg white known more formally as albumen or ovalbumin by one or two spiral bands of tissue called the chalazae.
What's the Internet Really Like in Space? | Universe Today
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The entrance of pollen-tubes into the nucellus by the chalaza, instead of through the micropyle, was first fully demonstrated by Treub in his paper "Sur les
More Letters of Charles Darwin — Volume 2
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At the same time, the flexible "chain" - called the chalazae - that holds the yolk in suspension weakens.
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Unique back design uses chalaza design, make back skin is shown indistinctly, reservation is sexy, add mature flavor.
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In _Casuarina_, _Juglans_ and the order Corylaceae, the pollen-tube does not enter by means of the micropyle, but passing down the ovary wall and through the placenta, enters at the chalazal end of the ovule.
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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The first thick layer of albumen protein is twisted by spiraling grooves in the oviduct wall to form the chalazae from the Greek for “small lump,” “hailstone”, two dense, slightly elastic cords which anchor the yolk to the ends of the shell and allow it to rotate while suspending it in the middle of the egg.
On Food and Cooking, The Science and Lore of the Kitchen
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If you are very picky, you will want to remove the chalaza.
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I have been thinking that the apparent opening at the chalaza end must have been withering or perhaps gnawing by some very minute insects, as the ovarium is open at the upper end.
More Letters of Charles Darwin — Volume 2
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The chalaza is composed of one or two spiral bands of tissue that suspend the yolk in the center of the white.
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Peroxidases are present in the crease tissue at this time and it has been suggested that they may have a role in the formation of lignin / suberin in the chalazal cell walls.
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These nutrients enter the seed through a single vascular bundle in the funiculus that extends into the seed coat as the chalazal vein and its two lateral branches.
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In the intact egg, the chalazae allow the germ cell to return to the top whenever the hen rearranges her eggs.
On Food and Cooking, The Science and Lore of the Kitchen
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In addition, a strong staining was observed in maternal chalazal tissue shortly after fertilization, and persisted throughout seed development.
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It is, furthermore, the case that the embryo sac itself also exhibits polar organization, with the egg cell and synergids adjacent to the micropyle, while the antipodal cells are found at the opposite chalazal end.