| 单词 | cupule |
| 例句 | What makes them the first true seed plants is that they developed structures called cupules to enclose and protect the ovule—the female gametophyte and associated tissues—which develops into a seed upon fertilization. Fundamentals of Biology 2015-01-01T00:00:00Z But no living plants have such cupules, and the fossils the researchers had found were of partially decayed plants, making thorough analysis impossible. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z Having fruit inclosed within a covering that does not form a part of itself; as, the filbert covered by its husk, or the acorn seated in its cupule. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z The generally one-seeded nut-like fruit is associated with the persistent often hardened or greatly enlarged bracts forming the so-called cupule which gives the name to the group. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z But in the Beech the "cupule" becomes a bristly closed box, which afterwards opens by one end splitting into four triangular silk-hair-lined valves, which turn back and reveal the three-sided, sharp-edged "mast." Wayside and Woodland Trees A pocket guide to the British sylva 2010-12-25T03:00:16.510Z In the Chestnut the cupule forms the bur; in the Hazel, a leafy husk. The Elements of Botany For Beginners and For Schools After comparing their new finds with other fossils with cupules, the researchers concluded that all belonged to a group of plants characterized by cupules of different types, they report today in Nature. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z The fruit of the oak, being an oval nut growing in a woody cup or cupule. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Bracts forming a fleshy or hard cupule which envelops the one to several fruits. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The female flowers, to the number of two, three, or four, are clustered in a "cupule" of overlapping scales, like those of the Oak. Wayside and Woodland Trees A pocket guide to the British sylva 2010-12-25T03:00:16.510Z The latter are borne three together, invested by a cupule of four green bracts, which, as the fruit matures, grow to form the tough green prickly envelope surrounding the group of generally three nuts. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The team found that, as with the outer seed coat in modern angiosperm seeds, the cupule tissue curved around the developing seeds. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z I quote Dr. Munro on his doings at Dunbuie, where the faker occasionally drops a pear-shaped slate perforated stone, with a design in cupules. The Clyde Mystery a Study in Forgeries and Folklore Now, having a whole group of potential closest relatives with a variety of cupule structures, “gives us different ideas about where the carpel has come from,” Donoghue says. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z As development of the ovary and seeds progresses, the cupule also grows, and ultimately entirely surrounds the cluster with the hedgehog-like coat in which the nuts are contained when ripe. Wayside and Woodland Trees A pocket guide to the British sylva 2010-12-25T03:00:16.510Z So Shi was intrigued in 2015, when a local from Inner Mongolia showed him a piece of rock with swamp plant fossils containing cupules with exquisitely preserved details. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z Their existence suggests not only where the second seed coat came from, but also how carpels came to be, as some of these cupules appear to have modified leaves that could have evolved into carpels. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z They called the outer coat a cupule and proposed that it was the precursor to the outer coat, or integument, of angiosperm seeds. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z Until now, researchers had focused on a fossil cupule plant called Caytonia, discovered in Yorkshire, U.K., as the closest relative to angiosperms. Exquisite fossils unearthed in Inner Mongolia reveal how peas got their hard coat 2021-05-26T04:00:00Z |
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