| 单词 | bryophyte |
| 例句 | We hiked a 1.5-mile loop, a truly Edenic journey that skips across a glowing Bay Creek and scrambles up rugged valley walls festooned in green and black bryophytes. A day’s drive from Chicago, exploring a very different Illinois 2021-02-11T05:00:00Z Collectively known as bryophytes, the three main groups include the liverworts, the hornworts, and the mosses. Fundamentals of Biology 2015-01-01T00:00:00Z The life cycle of bryophytes and pterophytes is characterized by the alternation of generations. Concepts of Biology 2013-04-25T00:00:00Z “In the Mojave Desert, a translucent crystal offers bryophytes much-needed respite from the heat of the sun.” Poem: ‘Mosses’ 2022-11-19T05:00:00Z It found 20-50% of terrestrial molluscs, shrubs and bryophytes, such as moss and liverworts, are threatened with extinction due to a loss of wild areas, expanded agriculture and climate change. More than half of native European trees face extinction, warns study 2019-09-27T04:00:00Z He added that the pharmaceutical promise of PET may raise the profile of bryophytes, the unsung group of plants that includes liverworts and mosses. Scientists say they've found a THC-like substance in a surprising plant: liverwort - Los Angeles Times 2018-10-26T04:00:00Z The lack of roots for absorbing water and minerals from the soil, as well as a lack of reinforced conducting cells, limits bryophytes to small sizes. Fundamentals of Biology 2015-01-01T00:00:00Z The first bryophytes most probably appeared in the Ordovician period, about 490 million years ago. Concepts of Biology 2013-04-25T00:00:00Z The Bryological Society of Japan, dedicated to the study of moss and other bryophytes—small rootless and flowerless plants—says membership is growing. In Japan, Moss Gathers New Fans 2015-11-03T05:00:00Z Today, its more than 65,000 specimens include vascular plants and bryophytes from the U.S., Student field work helps Kansas herbarium grow 2014-11-14T05:00:00Z Each of the central cells divides into four spores, precisely as in the bryophytes. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses In a hostile environment, like the tundra where the soil is frozen, bryophytes grow well because they do not have roots and can dry and rehydrate rapidly once water is again available. Fundamentals of Biology 2015-01-01T00:00:00Z In bryophytes, water and nutrients circulate inside specialized conducting cells. Concepts of Biology 2013-04-25T00:00:00Z The completion of the bryophyte and pterophyte life cycle requires water because the male gametophyte releases sperm, which must swim—propelled by their flagella—to reach and fertilize the female gamete or egg. Fundamentals of Biology 2015-01-01T00:00:00Z Both adaptations were required for the colonization of land begun by the bryophytes and their ancestors. Fundamentals of Biology 2015-01-01T00:00:00Z The spermatozoids are excessively small, and resemble those of the bryophytes. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Some reports indicate that bryophytes make the soil more amenable to colonization by other plants. Fundamentals of Biology 2015-01-01T00:00:00Z In a bryophyte, all the conspicuous vegetative organs belong to the haploid organism, or gametophyte. Concepts of Biology 2013-04-25T00:00:00Z In a bryophyte, all the conspicuous vegetative organs—including the photosynthetic leaf-like structures, the thallus, stem, and the rhizoid that anchors the plant to its substrate—belong to the haploid organism or gametophyte. Fundamentals of Biology 2015-01-01T00:00:00Z Lycophytes follow the pattern of alternation of generations seen in the bryophytes, except that the sporophyte is the major stage of the lifecycle. Fundamentals of Biology 2015-01-01T00:00:00Z The female organ in the bryophytes is called an “archegonium,” and differs considerably from anything we have yet studied, but recalls somewhat the structure of the oögonium of Chara. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses The lifecycle of bryophytes and pterophytes is characterized by the alternation of generations, like gymnosperms and angiosperms; what sets bryophytes and pterophytes apart from gymnosperms and angiosperms is their reproductive requirement for water. Fundamentals of Biology 2015-01-01T00:00:00Z The gametes formed by bryophytes swim using flagella. Concepts of Biology 2013-04-25T00:00:00Z Because of the lack of lignin and other resistant structures, the likelihood of bryophytes forming fossils is rather small. Fundamentals of Biology 2015-01-01T00:00:00Z Some spores protected by sporopollenin have survived and are attributed to early bryophytes. Fundamentals of Biology 2015-01-01T00:00:00Z The spermatozoids of a peat moss are shown in Figure 60, D. Like all of the bryophytes they have but two cilia. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Thin rhizoids attached bryophytes to the substrate, but these rather flimsy filaments did not provide a strong anchor for the plant; neither did they absorb substantial amounts of water and nutrients. Fundamentals of Biology 2015-01-01T00:00:00Z The sporangium, the multicellular sexual reproductive structure, is present in bryophytes. Concepts of Biology 2013-04-25T00:00:00Z The gametes formed by bryophytes swim with a flagellum, as do gametes in a few of the tracheophytes. Fundamentals of Biology 2015-01-01T00:00:00Z The sporangium—the multicellular sexual reproductive structure—is present in bryophytes and absent in the majority of algae. Fundamentals of Biology 2015-01-01T00:00:00Z The bryophyte embryo also remains attached to the parent plant, which protects and nourishes it. Fundamentals of Biology 2015-01-01T00:00:00Z The evolution of plants has resulted in widely varying levels of complexity, from the earliest algal mats, to bryophytes, lycopods, and ferns, to the complex gymnosperms and angiosperms of today. Fundamentals of Biology 2015-01-01T00:00:00Z Thin rhizoids attached the bryophytes to the substrate. Concepts of Biology 2013-04-25T00:00:00Z In bryophytes, such as mosses, the haploid gametophyte is more developed than the sporophyte. Fundamentals of Biology 2015-01-01T00:00:00Z |
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