英语词汇“microspore”造句子简单的方法、技巧、例句及翻译-英语例句辞典

Therefore, they generate microspores, which will generate pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes. Fundamentals of Biology 2015-01-01T00:00:00Z

The male spores are called microspores because of their smaller size; the comparatively larger megaspores will develop into the female gametophyte. Concepts of Biology 2013-04-25T00:00:00Z

In germination they develop a minute prothallus which bears archegonia to be fertilized by antherozoids developed from the microspores. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z

Three small cells occur inside the cavity of the microspore; two of them collapse and the third divides into two, forming a stalk-cell and a larger body-cell. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z

Base of a leaf and contained sporocarp filled with microspores cut across, magnified. The Elements of Botany For Beginners and For Schools

Through meiosis, the microsporangium forms microspores, and the megasporangium forms megaspores. Fundamentals of Biology 2015-01-01T00:00:00Z

Stamens are composed of a thin stalk called a filament and a sac-like structure, the anther, in which microspores are produced by meiosis and develop into pollen grains. Concepts of Biology 2013-04-25T00:00:00Z

In both forms cysts containing megaspores and megasporozoites, and others containing microspores and microsporozoites are found, considered as representing sexual differentiation thrown back to the very earliest stages of the life-cycle. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade"

It is clear, however, that in all these conidia, macrospores, microspores, and some spermatia, or by whatever names they may be called, there exists a power of germination. Fungi: Their Nature and Uses

Same divided lengthwise, equally magnified; some microspores seen at the left. The Elements of Botany For Beginners and For Schools

Both microspores and megaspores undergo mitosis, forming the microgametophyte and megagametophyte, respectively. Fundamentals of Biology 2015-01-01T00:00:00Z

Like all gymnosperms, pines are heterosporous and produce male microspores and female megaspores. Concepts of Biology 2013-04-25T00:00:00Z

In the Scotch pine the microspores are ripe about the end of May. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses

The subsequent behavior of the pollen cell, its division and its fertilization of the germinal vesicle or oosphere, leave no doubt as to its analogy with the microspore of vascular cryptogams. Scientific American Supplement, No. 531, March 6, 1886

The outer leaf-bases contain numerous macrospores; the inner are filled with innumerable microspores. The Elements of Botany For Beginners and For Schools

Like all gymnosperms, pines are heterosporous and generate two different types of spores: male microspores and female megaspores. Fundamentals of Biology 2015-01-01T00:00:00Z

In the male cones, or staminate cones, the microsporocytes give rise to microspores by meiosis. Concepts of Biology 2013-04-25T00:00:00Z

The filament supports the anther, where the microspores are produced by meiosis and develop into pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z

An inner layer of cells, known as the tapetum, provides nutrition to the developing microspores and contributes key components to the pollen wall. Fundamentals of Biology 2015-01-01T00:00:00Z

Portion magnified, showing the two kinds of sporocarp; the small ones contain microspores. The Elements of Botany For Beginners and For Schools

Inside the anthers’ microsporangia, male gametophytes divide by meiosis to generate haploid microspores, which, in turn, undergo mitosis and give rise to pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z

Illustration shows the formation of pollen from a microspore mother cell. Fundamentals of Biology 2015-01-01T00:00:00Z

The microsporangium contains microspore mother cells, which divide by meiosis to produce haploid microspores. Fundamentals of Biology 2015-01-01T00:00:00Z

The microspores develop into male gametophytes that are released as pollen. Fundamentals of Biology 2015-01-01T00:00:00Z

The larger ones contain each a large spore, or macrospore; the smaller contain numerous microspores, immersed in mucilage. The Elements of Botany For Beginners and For Schools

The microspore undergoes meiosis, producing four cells, each of which becomes a grain of pollen with a hard coating. Fundamentals of Biology 2015-01-01T00:00:00Z

Within the microsporangium, cells known as microsporocytes divide by meiosis to produce four haploid microspores. Fundamentals of Biology 2015-01-01T00:00:00Z

Further mitosis of the microspore produces two nuclei: the generative nucleus, and the tube nucleus. Fundamentals of Biology 2015-01-01T00:00:00Z

The microsporangia, which are usually bi-lobed, are pollen sacs in which the microspores develop into pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z

The large ones in germination produce a small prothallus; upon which the contents of the microspores act in the same way as in Ferns, and with a similar result. The Elements of Botany For Beginners and For Schools

The male spores are called microspores, because of their smaller size, and develop into the male gametophyte; the comparatively larger megaspores develop into the female gametophyte. Fundamentals of Biology 2015-01-01T00:00:00Z

Inside the pollen sac is a layer called the tapetum, and within this ring are the microspore mother cells. Fundamentals of Biology 2015-01-01T00:00:00Z

Figure 2. Pollen develops from the microspore mother cells. Fundamentals of Biology 2015-01-01T00:00:00Z

The small ones open across and discharge microspores; the larger burst irregularly, and bring to view globose spore-cases, attached to the bottom of the sporocarp by a slender stalk. The Elements of Botany For Beginners and For Schools

单词	microspore
例句	microspore Therefore, they generate microspores, which will generate pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes. Fundamentals of Biology 2015-01-01T00:00:00Z The male spores are called microspores because of their smaller size; the comparatively larger megaspores will develop into the female gametophyte. Concepts of Biology 2013-04-25T00:00:00Z In germination they develop a minute prothallus which bears archegonia to be fertilized by antherozoids developed from the microspores. The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee 2012-04-12T02:00:30.140Z Three small cells occur inside the cavity of the microspore; two of them collapse and the third divides into two, forming a stalk-cell and a larger body-cell. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Base of a leaf and contained sporocarp filled with microspores cut across, magnified. The Elements of Botany For Beginners and For Schools Through meiosis, the microsporangium forms microspores, and the megasporangium forms megaspores. Fundamentals of Biology 2015-01-01T00:00:00Z Stamens are composed of a thin stalk called a filament and a sac-like structure, the anther, in which microspores are produced by meiosis and develop into pollen grains. Concepts of Biology 2013-04-25T00:00:00Z In both forms cysts containing megaspores and megasporozoites, and others containing microspores and microsporozoites are found, considered as representing sexual differentiation thrown back to the very earliest stages of the life-cycle. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" It is clear, however, that in all these conidia, macrospores, microspores, and some spermatia, or by whatever names they may be called, there exists a power of germination. Fungi: Their Nature and Uses Same divided lengthwise, equally magnified; some microspores seen at the left. The Elements of Botany For Beginners and For Schools Both microspores and megaspores undergo mitosis, forming the microgametophyte and megagametophyte, respectively. Fundamentals of Biology 2015-01-01T00:00:00Z Like all gymnosperms, pines are heterosporous and produce male microspores and female megaspores. Concepts of Biology 2013-04-25T00:00:00Z In the Scotch pine the microspores are ripe about the end of May. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses The subsequent behavior of the pollen cell, its division and its fertilization of the germinal vesicle or oosphere, leave no doubt as to its analogy with the microspore of vascular cryptogams. Scientific American Supplement, No. 531, March 6, 1886 The outer leaf-bases contain numerous macrospores; the inner are filled with innumerable microspores. The Elements of Botany For Beginners and For Schools Like all gymnosperms, pines are heterosporous and generate two different types of spores: male microspores and female megaspores. Fundamentals of Biology 2015-01-01T00:00:00Z In the male cones, or staminate cones, the microsporocytes give rise to microspores by meiosis. Concepts of Biology 2013-04-25T00:00:00Z The filament supports the anther, where the microspores are produced by meiosis and develop into pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z An inner layer of cells, known as the tapetum, provides nutrition to the developing microspores and contributes key components to the pollen wall. Fundamentals of Biology 2015-01-01T00:00:00Z Portion magnified, showing the two kinds of sporocarp; the small ones contain microspores. The Elements of Botany For Beginners and For Schools Inside the anthers’ microsporangia, male gametophytes divide by meiosis to generate haploid microspores, which, in turn, undergo mitosis and give rise to pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z Illustration shows the formation of pollen from a microspore mother cell. Fundamentals of Biology 2015-01-01T00:00:00Z The microsporangium contains microspore mother cells, which divide by meiosis to produce haploid microspores. Fundamentals of Biology 2015-01-01T00:00:00Z The microspores develop into male gametophytes that are released as pollen. Fundamentals of Biology 2015-01-01T00:00:00Z The larger ones contain each a large spore, or macrospore; the smaller contain numerous microspores, immersed in mucilage. The Elements of Botany For Beginners and For Schools The microspore undergoes meiosis, producing four cells, each of which becomes a grain of pollen with a hard coating. Fundamentals of Biology 2015-01-01T00:00:00Z Within the microsporangium, cells known as microsporocytes divide by meiosis to produce four haploid microspores. Fundamentals of Biology 2015-01-01T00:00:00Z Further mitosis of the microspore produces two nuclei: the generative nucleus, and the tube nucleus. Fundamentals of Biology 2015-01-01T00:00:00Z The microsporangia, which are usually bi-lobed, are pollen sacs in which the microspores develop into pollen grains. Fundamentals of Biology 2015-01-01T00:00:00Z The large ones in germination produce a small prothallus; upon which the contents of the microspores act in the same way as in Ferns, and with a similar result. The Elements of Botany For Beginners and For Schools The male spores are called microspores, because of their smaller size, and develop into the male gametophyte; the comparatively larger megaspores develop into the female gametophyte. Fundamentals of Biology 2015-01-01T00:00:00Z Inside the pollen sac is a layer called the tapetum, and within this ring are the microspore mother cells. Fundamentals of Biology 2015-01-01T00:00:00Z Figure 2. Pollen develops from the microspore mother cells. Fundamentals of Biology 2015-01-01T00:00:00Z The small ones open across and discharge microspores; the larger burst irregularly, and bring to view globose spore-cases, attached to the bottom of the sporocarp by a slender stalk. The Elements of Botany For Beginners and For Schools
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