英语词汇“self-fertilization”造句的方法、技巧、例句及翻译-英语例句辞典

Many species have specific mechanisms in place to prevent self-fertilization, because it is an extreme form of inbreeding and usually produces less fit offspring. Concepts of Biology 2013-04-25T00:00:00Z

The researchers tried to collect additional mushrooms in New Jersey and New York, where the fungus is spreading less quickly, but they didn’t find evidence of self-fertilization. Death cap mushroom’s unusual sex life may be key to its rapid spread 2023-02-02T05:00:00Z

Many species of plants, including the sunflower pictured here, are capable of self-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z

Seeds from the self-fertilization grew into healthy plants without any inbreeding problems, the researchers report online in The American Naturalist. Watch this shy plant engage in some ‘self-love’ when it can’t find any pollinators 2019-02-14T05:00:00Z

As convenient as it might sound to forego the headaches of courting a mate, the team points out that self-fertilization comes at a cost: the isolated worms produced fewer hatchlings with lower survival rates. Lonely flatworms inject sperm into their own heads 2015-07-01T04:00:00Z

Flowers often showy, commonly singular in shape, solitary, racemed, or spiked, each subtended by a bract,—in all arranged for fertilization by the aid of insects, very few capable of unaided self-fertilization. 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

Some flowers, such as rye, have lost the power of effective self-fertilization, but in most cases both forms, self- and cross-fertilization, seem to be possible. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z

Although self-fertilization forms seeds by meiosis, all of the resulting plants will be identical. Biology for AP Courses 2022-06-09T00:00:00Z

The new move would be no surprise to Charles Darwin, who in 1876 suggested that flowers in places with few pollinators would likely engage in self-fertilization. Watch this shy plant engage in some ‘self-love’ when it can’t find any pollinators 2019-02-14T05:00:00Z

As I have excluded self-fertilization, it is necessary, if we are to get any trustworthy results, that one should consider the mode in which fertilization will be produced. Darwin, and After Darwin (Vol 3 of 3) Post-Darwinian Questions: Isolation and Physiological Selection 2011-10-18T02:00:18.363Z

This is self-fertilization, and is easily provided for by the mere bending of the head of the flower as it approaches maturity, or by the swaying of it in the breeze. The Relations of Science and Religion The Morse Lecture, 1880 2011-09-11T02:00:11.613Z

It is comparatively rare in hermaphrodite flowers for self-fertilization to occur, and the various forms of dichogamy, dimorphism and trimorphism are fitted to prevent this. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z

Before the plants have matured, you remove the pollen-producing organs from the tall/inflated plants in your crosses to prevent self-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z

Darwin weighed and counted the seeds from cross-fertilized plants compared to self-fertilized plants and saw that self-fertilization was not nearly as good as cross-fertilization in terms of numbers and vigor. SCIENCE NEWS 2010-05-11T04:00:00Z

Accordingly, some flowers are particularly adapted to close or self-fertilization; others to cross fertilization; some for either, according to circumstances. The Elements of Botany For Beginners and For Schools

Professor Darwin says self-fertilization is abhorrent to nature, and the same rule that applies to small fruits is equally applicable to apples. The Apple

But even in plants with hermaphrodite flowers self-fertilization is often provided against by the structure of the parts or by the period of ripening of the organs. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z

Since self-fertilization is the normal process in this bean the purity of the germ plasm already existed when Johannsen began to experiment. A Critique of the Theory of Evolution

Again, some flowers have an ovary but no stamens, while a neighbor has stamens but no ovary, making self-fertilization absolutely impossible. The Renewal of Life; How and When to Tell the Story to the Young

The controls which were not emasculated and not hand pollinated, show that the trees are practically completely self sterile; only an occasional nut is set from self-fertilization. Northern Nut Growers Association Report of the Proceedings at the 44th Annual Meeting Rochester, N.Y. August 31 and September 1, 1953

They possess no possible resource for self-fertilization in the neglect of these insect sponsors. My Studio Neighbors

And he shows how this species is even wonderfully and specially modified to effect self-fertilization. On the Genesis of Species

In the flower where the father and mother part matures at the same time, self-fertilization is the rule. The Mother and Her Child

At first sight it would appear that most flowers are especially adapted for self-fertilization; but in fact, although stamens and pistils are in the same flower, there are usually effective preventives for avoiding self-fertilization. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses

This species has the rare privilege of self-fertilization—we may well exclaim, Why! why?—and it eagerly avails itself thereof so soon as the flower begins to open. About Orchids A Chat

The "Column" in Various Orchids Many of our common wild flowers, as perfectly and effectually planned for cross-fertilization as the orchids, do retain the reserve power of final self-fertilization if unfertilized by foreign pollen. My Studio Neighbors

Antonyms: self-indulgence, sensuality, voluptuousness. self-denying, a. self-sacrificing, unselfish, ascetic, abstemious. self-evident, a. axiomatic, obvious. self-examination, n. introspection; autoscopy. self-explanatory, a. obvious. self-fear, n. self-distrust, autophoby. self-fertilization, n. autogamy. self-government, n. self-control; democracy; autonomy. Putnam's Word Book

As self-fertilization is impossible, the showy blossoms of the wood-sorrel are a necessity not a luxury; for the insects must not be allowed to overlook them. Wild Flowers Worth Knowing

One of the commonest means of avoiding self-fertilization is the maturing of stamens and pistils at different times. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses

I have already mentioned its small corolla, surpassed by the lobes of the calyx and its capacity of self-fertilization. Species and Varieties, Their Origin by Mutation

Occasional self-fertilization is surely better than setting no seed at all when insects fail. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Notice that after a flower's stamens protrude in the second stage of its development the fork is turned far to one side to get out of harm's way - self-fertilization being an abomination. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

When the inner row of anthers shed their pollen, some doubtless falls on the stigmas below them, and so spontaneous self-fertilization may occur. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

These have their organs so arranged as to make self-fertilization impossible. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

The anthers open in the flower-buds and pollinate the stigmas before the expansion of the flowers, thus assuring self-fertilization. Species and Varieties, Their Origin by Mutation

At this time, the anthers being closed, self-fertilization is impossible. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Presently the fertilized stigmas wither, and when they have safely escaped the danger of self-fertilization, the pollen hidden under their lobes ripens and dusts afresh the little flies so impatiently awaiting the feast. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Now the advanced stigma of this flower is peculiarly irritable, and closes up on contact with an incoming visitor's body, thus exposing the pollen-laden anthers behind it, and, except in rare cases, preventing self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

But by first maturing its anthers, then when they have shed their pollen, elevating its stigmas, the teasel prevents self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

I tried both self-fertilization and cross-pollination, and only with utmost care did I succeed in saving barely a hundred seeds. Species and Varieties, Their Origin by Mutation

An occasional lapse matters little; it is perpetual self-fertilization that Nature abhors. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Many blossoms are male on the first day of opening, and female later, to protect themselves against self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

The anthers are too widely separated from the stigma to make self-fertilization likely. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Like their relatives, they first ripen their anthers to prevent self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Ordinarily the flowers remained sterile if not visited by insects or pollinated by myself, although rare instances of self-fertilization were seen. Species and Varieties, Their Origin by Mutation

Did not the floret pass through two distinct stages, first male, then female, self-fertilization, not cross-fertilization, would be the inevitable result. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

As their inner row of anthers comes very close to the stigmas, spontaneous self-fertilization may sometimes occur; although in fine weather small bees, especially, visit them constantly. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

Hildebrand proved by patient experiments that some flowers of this genus have not only lost the power of self-fertilization, but that they produce fertile seed only when pollen from another plant is carried to them. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

In some such manner most of our orchids compel insects to work for them in preventing self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors

One instance however, is very remarkable, and we have already dealt with it, when treating of constant varieties, and of the lack of vicinism in the case of species with exclusive self-fertilization. Species and Varieties, Their Origin by Mutation

单词	self-fertilization
例句	self-fertilization Many species have specific mechanisms in place to prevent self-fertilization, because it is an extreme form of inbreeding and usually produces less fit offspring. Concepts of Biology 2013-04-25T00:00:00Z The researchers tried to collect additional mushrooms in New Jersey and New York, where the fungus is spreading less quickly, but they didn’t find evidence of self-fertilization. Death cap mushroom’s unusual sex life may be key to its rapid spread 2023-02-02T05:00:00Z Many species of plants, including the sunflower pictured here, are capable of self-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Seeds from the self-fertilization grew into healthy plants without any inbreeding problems, the researchers report online in The American Naturalist. Watch this shy plant engage in some ‘self-love’ when it can’t find any pollinators 2019-02-14T05:00:00Z As convenient as it might sound to forego the headaches of courting a mate, the team points out that self-fertilization comes at a cost: the isolated worms produced fewer hatchlings with lower survival rates. Lonely flatworms inject sperm into their own heads 2015-07-01T04:00:00Z Flowers often showy, commonly singular in shape, solitary, racemed, or spiked, each subtended by a bract,—in all arranged for fertilization by the aid of insects, very few capable of unaided self-fertilization. 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 Some flowers, such as rye, have lost the power of effective self-fertilization, but in most cases both forms, self- and cross-fertilization, seem to be possible. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Although self-fertilization forms seeds by meiosis, all of the resulting plants will be identical. Biology for AP Courses 2022-06-09T00:00:00Z The new move would be no surprise to Charles Darwin, who in 1876 suggested that flowers in places with few pollinators would likely engage in self-fertilization. Watch this shy plant engage in some ‘self-love’ when it can’t find any pollinators 2019-02-14T05:00:00Z As I have excluded self-fertilization, it is necessary, if we are to get any trustworthy results, that one should consider the mode in which fertilization will be produced. Darwin, and After Darwin (Vol 3 of 3) Post-Darwinian Questions: Isolation and Physiological Selection 2011-10-18T02:00:18.363Z This is self-fertilization, and is easily provided for by the mere bending of the head of the flower as it approaches maturity, or by the swaying of it in the breeze. The Relations of Science and Religion The Morse Lecture, 1880 2011-09-11T02:00:11.613Z It is comparatively rare in hermaphrodite flowers for self-fertilization to occur, and the various forms of dichogamy, dimorphism and trimorphism are fitted to prevent this. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z Before the plants have matured, you remove the pollen-producing organs from the tall/inflated plants in your crosses to prevent self-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Darwin weighed and counted the seeds from cross-fertilized plants compared to self-fertilized plants and saw that self-fertilization was not nearly as good as cross-fertilization in terms of numbers and vigor. SCIENCE NEWS 2010-05-11T04:00:00Z Accordingly, some flowers are particularly adapted to close or self-fertilization; others to cross fertilization; some for either, according to circumstances. The Elements of Botany For Beginners and For Schools Professor Darwin says self-fertilization is abhorrent to nature, and the same rule that applies to small fruits is equally applicable to apples. The Apple But even in plants with hermaphrodite flowers self-fertilization is often provided against by the structure of the parts or by the period of ripening of the organs. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z Since self-fertilization is the normal process in this bean the purity of the germ plasm already existed when Johannsen began to experiment. A Critique of the Theory of Evolution Again, some flowers have an ovary but no stamens, while a neighbor has stamens but no ovary, making self-fertilization absolutely impossible. The Renewal of Life; How and When to Tell the Story to the Young The controls which were not emasculated and not hand pollinated, show that the trees are practically completely self sterile; only an occasional nut is set from self-fertilization. Northern Nut Growers Association Report of the Proceedings at the 44th Annual Meeting Rochester, N.Y. August 31 and September 1, 1953 They possess no possible resource for self-fertilization in the neglect of these insect sponsors. My Studio Neighbors And he shows how this species is even wonderfully and specially modified to effect self-fertilization. On the Genesis of Species In the flower where the father and mother part matures at the same time, self-fertilization is the rule. The Mother and Her Child At first sight it would appear that most flowers are especially adapted for self-fertilization; but in fact, although stamens and pistils are in the same flower, there are usually effective preventives for avoiding self-fertilization. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses This species has the rare privilege of self-fertilization—we may well exclaim, Why! why?—and it eagerly avails itself thereof so soon as the flower begins to open. About Orchids A Chat The "Column" in Various Orchids Many of our common wild flowers, as perfectly and effectually planned for cross-fertilization as the orchids, do retain the reserve power of final self-fertilization if unfertilized by foreign pollen. My Studio Neighbors Antonyms: self-indulgence, sensuality, voluptuousness. self-denying, a. self-sacrificing, unselfish, ascetic, abstemious. self-evident, a. axiomatic, obvious. self-examination, n. introspection; autoscopy. self-explanatory, a. obvious. self-fear, n. self-distrust, autophoby. self-fertilization, n. autogamy. self-government, n. self-control; democracy; autonomy. Putnam's Word Book As self-fertilization is impossible, the showy blossoms of the wood-sorrel are a necessity not a luxury; for the insects must not be allowed to overlook them. Wild Flowers Worth Knowing One of the commonest means of avoiding self-fertilization is the maturing of stamens and pistils at different times. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses I have already mentioned its small corolla, surpassed by the lobes of the calyx and its capacity of self-fertilization. Species and Varieties, Their Origin by Mutation Occasional self-fertilization is surely better than setting no seed at all when insects fail. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Notice that after a flower's stamens protrude in the second stage of its development the fork is turned far to one side to get out of harm's way - self-fertilization being an abomination. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors When the inner row of anthers shed their pollen, some doubtless falls on the stigmas below them, and so spontaneous self-fertilization may occur. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors These have their organs so arranged as to make self-fertilization impossible. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The anthers open in the flower-buds and pollinate the stigmas before the expansion of the flowers, thus assuring self-fertilization. Species and Varieties, Their Origin by Mutation At this time, the anthers being closed, self-fertilization is impossible. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Presently the fertilized stigmas wither, and when they have safely escaped the danger of self-fertilization, the pollen hidden under their lobes ripens and dusts afresh the little flies so impatiently awaiting the feast. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Now the advanced stigma of this flower is peculiarly irritable, and closes up on contact with an incoming visitor's body, thus exposing the pollen-laden anthers behind it, and, except in rare cases, preventing self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors But by first maturing its anthers, then when they have shed their pollen, elevating its stigmas, the teasel prevents self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors I tried both self-fertilization and cross-pollination, and only with utmost care did I succeed in saving barely a hundred seeds. Species and Varieties, Their Origin by Mutation An occasional lapse matters little; it is perpetual self-fertilization that Nature abhors. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Many blossoms are male on the first day of opening, and female later, to protect themselves against self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The anthers are too widely separated from the stigma to make self-fertilization likely. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Like their relatives, they first ripen their anthers to prevent self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Ordinarily the flowers remained sterile if not visited by insects or pollinated by myself, although rare instances of self-fertilization were seen. Species and Varieties, Their Origin by Mutation Did not the floret pass through two distinct stages, first male, then female, self-fertilization, not cross-fertilization, would be the inevitable result. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors As their inner row of anthers comes very close to the stigmas, spontaneous self-fertilization may sometimes occur; although in fine weather small bees, especially, visit them constantly. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Hildebrand proved by patient experiments that some flowers of this genus have not only lost the power of self-fertilization, but that they produce fertile seed only when pollen from another plant is carried to them. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors In some such manner most of our orchids compel insects to work for them in preventing self-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors One instance however, is very remarkable, and we have already dealt with it, when treating of constant varieties, and of the lack of vicinism in the case of species with exclusive self-fertilization. Species and Varieties, Their Origin by Mutation
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