| 单词 | cross-fertilization |
| 例句 | Mendel’s gift was experimentation—the manipulation of organisms, cross-fertilization of carefully selected sub-breeds, the testing of hypotheses. The Gene 2016-06-02T00:00:00Z "Sometimes one or two musicians from one band will come and sit in with members of another group, so there's a lot of cross-fertilization," he said in a phone call from his Los Angeles apartment. Former Bauhaus bassist David J to play Tractor Tavern 2012-05-31T22:58:48Z The class thing is very dominant there, but in the cultural cross-fertilization I felt a sense of belonging.” | Neneh Cherry Makes a Cathartic Comeback 2014-02-21T18:30:41Z Curator Michael Taylor said the show will provide visitors with "a unique opportunity to reconsider the cross-fertilization that took place" when Chagall and his contemporaries lived and worked in Paris. Philly exhibit looks at Chagall's life in Paris 2011-02-26T19:01:04Z Fantasy, horror and science fiction are porous genres, allowing for, and even encouraging, cross-fertilization. Review | This is getting weird: Critics on horror, science fiction and fantasy 2018-08-14T04:00:00Z One that, as the brand’s last collection made clear, happens to share her husband’s belief in the value of cross-border relationships and cross-fertilization. Brigitte Macron Inaugurates a New Look for France 2017-05-15T04:00:00Z The cross-fertilization of ideas and inspiration between art and design continues apace. Fine Art Exhibition of Work from the 1960s Opens in New York 2015-05-12T04:00:00Z But at the same time they were all also envisioning a future for music where boundaries didn’t exist, where you could have a cross-fertilization between the avant-garde, classical music and pop. A ?60s Mash-Up That Didn?t Happen 2011-03-06T01:44:59Z So he filled the 99-seat space with a nonstop mix of comedy, music and theater, whose creators ended up watching one another’s work — an organic, accidental cross-fertilization. Even Billy Eichner Likes This Guy 2019-03-13T04:00:00Z We were somewhat at the tail end of that cross-fertilization. A once-in-a-lifetime reunion: Talking Heads on 'Stop Making Sense,' the Big Suit and their future 2023-09-20T04:00:00Z Music has historically been the country’s ethnically richest art form, particularly embodied in the multicultural story of jazz and in today’s cross-fertilization between popular genres. Review | Brendan Slocumb’s latest is as rich and suspenseful as ‘The Violin Conspiracy’ 2023-04-20T04:00:00Z The overlap reflects the growing cross-fertilization of official statements and state media reports in the two countries, especially regarding the United States. Meta Removes Chinese Effort to Influence U.S. Elections 2022-09-27T04:00:00Z The garden pea has flowers that close tightly to prevent cross-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z Kelly says he sees the move into L.A. as a “two-way cross-fertilization.” Why New York art galleries are flocking to Los Angeles — and how it's altering the art scene 2022-07-27T04:00:00Z “Artists come to experiment and try new ideas. This innately creates a cross-fertilization where the artists’ new ideas influence the Museum of Glass team and the team’s expertise influences artists’ work,” she explains. How access to workspace helps glass artists thrive in the Pacific Northwest | Provided by Museum of Glass 2022-04-22T04:00:00Z Despite our tendency to tie leaders to one particular movement, it turns out that a great deal of cross-fertilization was underway — among individuals as well as movements. Review | In the 1950s, their lonely battles on rights and the environment heralded changes to come 2022-02-11T05:00:00Z “You yearn for that cross-fertilization, because sometimes it takes you to a better place. A director may need someone to articulate what is un-articulatable for them.” These writers just had to direct their own stories. Here's why that works. 2021-03-03T05:00:00Z The garden pea has flowers that close tightly to promote cross-fertilization. Biology for AP Courses 2022-06-09T00:00:00Z The Be More Chill community is a product of what might be called fanbase cross-fertilization. The little musical that could: how Be More Chill became a teen sensation 2018-08-28T04:00:00Z Instead, they look to South America and Concrete art, with its cross-fertilization of imported European and indigenous modernisms. 'Made in L.A. 2018': Why the Hammer biennial is the right show for disturbing times 2018-06-05T04:00:00Z She continued, “This going back and forth and cross-fertilization and reckoning is very important.” Tracy K. Smith, America’s Poet Laureate, Is a Woman With a Mission 2018-04-10T04:00:00Z Visual artists are keen, intelligent, faithful, and dedicated observers of human perception—so there is ample potential for collaboration and cross-fertilization with perceptual neuroscience. Celebrating Sun-Earth Day: A Total Eclipse of the Mind 2018-03-25T04:00:00Z The cross-fertilization of languages, cultures and ideas within the dynasty led to major advances in art and technology, like the invention of everything from gunpowder to woodblock printing. South Korea’s Most Dangerous Enemy: Demographics 2018-02-20T05:00:00Z Kjus, whose combined gold medal in 1994 was one of the successes that inspired the likes of Nestvold-Haugen, said the cross-fertilization of ideas at the Olympic center was a key factor. Norway win 38th Pyeongchang medal to surpass U.S. record 2018-02-23T05:00:00Z Mr. Moore viewed what some critics considered a revolving door between government and the private sector as an opportunity for cross-fertilization. Jonathan Moore, Academic and Public Servant for 6 Presidents, Dies at 84 2017-03-14T04:00:00Z Forms of dress and music spring up because of cross-fertilization. Review | How can fashion represent America in 2017? 2017-02-17T05:00:00Z We learn from memoirs about the rich cross-fertilization among practitioners of different genres even after apartheid removed and separated artistic communities. Record Sleeves Tell South African Music's History 2016-09-15T04:00:00Z Another prime example of cross-fertilization is the theory of quantum error-correcting codes, which physicists invented to aid the construction of quantum computers. The quantum source of space-time 2015-11-15T05:00:00Z Kjus, whose combined gold medal in 1994 was one of the successes that inspired the likes of Nestvold-Haugen, said the cross-fertilization of ideas at the Olympic center was a key factor. Norway win 38th Pyeongchang medal to surpass U.S. record 2018-02-23T05:00:00Z For one, "There's a lot of cross-fertilization across the network, and a lot of people are taking advantage of each other's expertise," Cacchione said. The Power – and Potential Pitfalls – of Health Partnerships 2015-10-19T04:00:00Z Successful societies are ones that nurture their own ideas while being open to ideas from outside and then proceed to blend them in a dynamic process of cultural cross-fertilization and fermentation. China's Elusive Quest For "Values" 2015-07-13T04:00:00Z Cohen’s world seems to be one event like this after another: endless soirees for the cross-fertilization of influence between elites and their vassals, under the pious rubric of “civil society.” Assange: Google Is Not What It Seems “That cross-fertilization is fascinating to me,” said Ms. Taylor. Beyond the Dust Bowl With Dorothea Lange 2014-08-25T04:00:00Z She even brought in boxes of bees to encourage cross-fertilization and the kind of open pollination that is rare with these plants. An 800-Year-Old Shot of Youth 2014-08-18T04:00:00Z "The scrap raises the possibility that the novel inspired James's sermon and even demonstrates the cross-fertilization between Jane Austen's creative writing and the wider life of her family." Austen's hidden note linked to novel 2014-05-21T04:00:00Z Mindfulness works, but to better understand how, we need more cross-fertilization of ideas and methods between mindfulness and parallel approaches such as clinical hypnosis. Readers Respond to "Being in the Now" 2013-07-13T22:45:00.567Z As a result, biomedicine is losing the historically productive cross-fertilization between model systems and human biology. [Editorial] A Perverted View of “Impact” 2013-06-13T17:55:08.953Z Dory cited danger from what she called "a network of violent extremist organizations in Africa, from Egypt to Libya to Somalia to Nigeria", describing a risk of "cross-fertilization and cross-pollination between affiliated groups". US wary of Africa "terrorist" threat, Senegal detains suspects 2013-02-15T16:16:32Z By forcing cross-fertilization between people with different specialties, NYTimes will force them all to learn from each other, become more sophisticated, to tackle more complex and nuanced stories, and to produce better articles. Why the NYTimes "Green Blog" Is Now Essential 2013-01-13T19:45:10.770Z Industry cross-fertilization rarely occurs because we typically stay in our own silos. 8 Ways to Be Innovative (Even if You're Not) 2012-12-27T14:35:00Z This lack of cross-fertilization means that we miss opportunities to improve, create, and innovate. To-Do Today: Eat Lunch With a Colleague 2012-09-25T14:30:29Z "The whole of London is a zone of intellectual and cultural cross-fertilization, with all the energy and enthusiasm that I am told is to be found in the Olympic village itself," he said. Mayor wants inspiration, not procreation at London Games 2012-07-26T16:41:37Z It is obvious that hybridization differs more in degree than in kind from cross-fertilization. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z He suggests that ants are not very desirable visitors for promoting cross-fertilization among plants, as their progress is slow, and they cannot visit many plants far apart. The Wild Flowers of California: Their Names, Haunts, and Habits 2012-02-17T03:00:37.163Z Though it’s time to go, Allen still finds time to tell me about his plans for a cross-fertilization of arts and sciences that he wants to set rolling in Durham, his hometown. Star Art Knight Allen Lambastes Fake Divas, Divos: Interview 2012-01-23T03:10:08Z 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 This is a curious contrivance for insuring cross-fertilization through the help of the bees. Trees Worth Knowing 2011-10-13T02:00:48.357Z The artificial process is practically the same in hybridization as in cross-fertilization, but usually requires more care. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z Such cross-fertilization benefits businesses by strengthening links with potential partners, and entire industries by raising everyone's game. The New World of Mentoring 2011-09-27T07:00:00Z This process, known as cross-fertilization, gives a healthy and vigorous growth; want of it, will lead to degeneration, and ultimate extinction. The Relations of Science and Religion The Morse Lecture, 1880 2011-09-11T02:00:11.613Z In some cultivated races of barley, cross-fertilization is precluded, as the flowers never open. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z The brightly colored blossoms are abundantly provided with nectar and pollen, and they attract great numbers of bees, moths, and butterflies, in order to bring about cross-fertilization. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z The conveyance of pollen from one flower to another in cross-fertilization is effected naturally by the wind, or by the agency of insects and other creatures. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z Propagation by seed is limited to the efforts to obtain new varieties after cross-fertilization, and is a discouragingly slow and uncertain process. Making a Rose Garden 2011-07-29T02:00:21.533Z First, it has been confirmed by varying lines of evidence that transference of pollen, or cross-fertilization, is of special value in the development of plant life. The Relations of Science and Religion The Morse Lecture, 1880 2011-09-11T02:00:11.613Z Darwin and other scientists concluded that this was a mechanism to minimize self-pollination and promote cross-fertilization, with the aid of pollinating insects. Primroses can get you primed for spring 2011-03-16T20:23:21Z As the stamens and pistil are borne by different flowers, cross-fertilization is necessary. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 "Ethiopia" to "Evangelical Association" 2011-03-05T03:00:24.537Z The flowers are erect when they open, and the stigmas mature before the anthers, so that cross-fertilization is favoured in this species. Wayside and Woodland Trees A pocket guide to the British sylva 2010-12-25T03:00:16.510Z Hybrid—a new species resulting from the cross-fertilization of two species. Making a Rose Garden 2011-07-29T02:00:21.533Z Still, there is far less religious cross-fertilization than, say, racial. City Critic: Injecting a Sense of Play in Religious Tradition 2010-09-26T01:50:00Z Beyond personal financial benefits, the interchange of ideas between campus and corporation can allow for a fruitful cross-fertilization. A Fear That Academics Are Distracted Directors 2010-07-31T21:25:00Z Especially as the Internet enables the cross-fertilization of information, we like to believe that all of this leads to more innovation — as, in fact, it often does. Prototype: Whose Idea Was the Dry-Cleaning Bag Anyway? 2010-07-10T18:34:00Z 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 It is said that, in proportion to their numbers, hummingbirds assist as much as insects in the work of cross-fertilization. A-Birding on a Bronco In flowers, the brilliant ornamental pigments undoubtedly serve to attract the insects which visit these blossoms in search of nectar, and in so doing promote cross-fertilization. The Chemistry of Plant Life I believe that cross-fertilization is beneficial to an orchard in making fruit more plentiful, larger, smoother, better color and quality. The Apple Thus each bloom is fertilized with the pollen from some other, insuring cross-fertilization. Old Plymouth Trails The more kinds that are cultivated together, the greater will be the varieties raised from their seeds, by cross-fertilization in the blossoms. Soil Culture Amalgamation, while it is limited to the crossing of racial traits through intermarriage, naturally promotes assimilation or the cross-fertilization of social heritages. Introduction to the Science of Sociology The Indians, however, did not believe it right or good to impart their knowledge to the layman, Indian or European; therefore, cross-fertilization between the two schools of medicine was limited. Medicine in Virginia, 1607-1699 All my fruits are set for cross-fertilization, and I shall continue to set that way. The Apple The insects serve the flowers by carrying the fertilizing pollen from one flower to another, and thus promoting cross-fertilization among separate individual plants of the same species. More Science From an Easy Chair While the cross-fertilization of the same order of plants is so desirable, it is not possible for the pollen of one order to fertilize the ovules of another order. The Renewal of Life; How and When to Tell the Story to the Young Indeed, the fruitful process of interaction between the differing formulations of the concept in biology and economics is a significant illustration of the cross-fertilization of the sciences. Introduction to the Science of Sociology Like many other wind-fertilized flowers, the stamens and pistils are collected on different plants—a plan which absolutely insures cross-fertilization, without the aid of the insects. Journeys Through Bookland, Vol. 8 Interstate migration went steadily on—a process of cross-fertilization of ideas and institutions. The Frontier in American History Cross-fertilization is thus insured; and, moreover, cross-fertilization not only from a distinct flower, but from a separate cluster, or even a separate plant. My Studio Neighbors Thus by careful cross-fertilization, we are able to produce not only beautiful and new blossoms, but also many delicious new fruits. The Renewal of Life; How and When to Tell the Story to the Young The growing cosmopolitanism of all peoples and their adoption of the best that each has achieved is being produced by commerce, migration, and "contact and cross-fertilization of cultures." Society Its Origin and Development There is evidence that the subcabinet group was responsible for considerable cross-fertilization of civil rights programs among the departments. Integration of the Armed Forces, 1940-1965 As might be expected, there are numerous contrivances for cross-fertilization among them, some of which are so extraordinary as to be scarcely credible. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses 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 Since cross-fertilization is so valuable, it is not surprising to find many devices in the plant world for securing it. The Renewal of Life; How and When to Tell the Story to the Young Therefore, if nuts for seed are desired, keep each grove of pure strain separate that there may be no deterioration owing to cross-fertilization. Walnut Growing in Oregon Aristotle, three hundred years before Christ, had suggested that, by cross-fertilization and change of environment, new species had been and were being evoked. Little Journeys to the Homes of the Great - Volume 12 Little Journeys to the Homes of Great Scientists If a phrase will do instead of an explanation, we may sum them up, with the brilliant French psychologist, Tarde, as "a cross-fertilization of imitations." Anthropology The Result of the Bee's Visit During a period of many years the writer has devoted much study to our native species of orchids from this evolutionary stand-point of their cross-fertilization tendencies. My Studio Neighbors Honey and color, which attract winged messengers, are among the most universal helps to cross-fertilization. The Renewal of Life; How and When to Tell the Story to the Young The colors of flowers seem to exist mainly for the attraction of insects to insure cross-fertilization, and certain insects seem to prefer certain colors. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 Pansies are the easiest of plants to grow from seed, and they offer a ready response to experiments with cross-fertilization. The Library of Work and Play: Gardening and Farming. "A cross-fertilization of ideas" was thus carried on by Providence. The Right and Wrong Uses of the Bible Let us consider the flower simply as a device to insure its own cross-fertilization. My Studio Neighbors There are many books that give valuable and delightful information about cross-fertilization. The Renewal of Life; How and When to Tell the Story to the Young And flowers, by their nectar, color, and odor, compete for the visits of insects, which insure cross-fertilization. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 In the greenhouse a hive of bees is kept so that cross-fertilization may go on. The Library of Work and Play: Gardening and Farming. Miraculous toilers, sexless hybrids—successful ventures into Nature's arcanum of cross-fertilization—steady, humorous, wise, enduring, and homely unto pain! Fate Knocks at the Door A Novel Darwin thus foretold the precise manner of the cross-fertilization of Habenaria mascula, and also the insect agent, simply by the structural prophecy of the flower itself. My Studio Neighbors Another truth to be learned from the flowers is the value of cross-fertilization. The Renewal of Life; How and When to Tell the Story to the Young Now, my friends, the bookseller is one of the keys in that universal adding machine, because he aids in the cross-fertilization of men and books. The Haunted Bookshop Economic and even medical aspects should appear, and prominent and early should come the whole matter of self cross-fertilization and that by insects. Youth: Its Education, Regimen, and Hygiene Few flowers, sometimes only one opens on a spike on a given evening—a plan to increase the chances of cross-fertilization between distinct plants; but there is a very long succession of bloom. Wild Flowers Worth Knowing Examination of the flower, with the form of this moth in mind, will show other adaptations to the insect's form in the position of pollen and stigma, looking to the flower's cross-fertilization. My Studio Neighbors Indeed there is nothing more fascinating in the study of botany than the methods by which the flowers secure cross-fertilization, nearly all of our common garden-flowers affording illustrations. The Renewal of Life; How and When to Tell the Story to the Young It is only necessary to apply the two precautions of excluding all cross-fertilization, and of gathering the seeds of each individual separately. Species and Varieties, Their Origin by Mutation In Nature, even with hermaphrodite plants, there is a vast amount of cross-fertilization among various individuals of the same species. Darwiniana; Essays and Reviews Pertaining to Darwinism When the modern plant breeder seeks to produce something new by cross-fertilization a problem is encountered. Three Acres and Liberty Since that time, many years ago, I have often sat long and patiently in the haunt of the cypripedium awaiting a natural demonstration of its cross-fertilization, but as yet no insect has rewarded my devotion. My Studio Neighbors In many localities the arbutus sets no fruit, for it is still undergoing evolutionary changes looking toward the perfecting of an elaborate system to insure cross-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors By transplanting them into my garden, I have isolated them and kept them free from cross-fertilization with the ordinary type. Species and Varieties, Their Origin by Mutation They may be smothered out by the adverse force of superior numbers; they are even more likely to be bred out of existence by unprevented cross-fertilization, or to disappear from mere change of fashion. Darwiniana; Essays and Reviews Pertaining to Darwinism It was a vast and happy intermingling of nationalities that settled down in China in 1982 and the years that followed—a tremendous and successful experiment in cross-fertilization. The Strength of the Strong Darwin mentions bees as the implied fertilizers, and doubtless many of the smaller bees do effect cross-fertilization in the smaller species. My Studio Neighbors After cross-fertilization has been effected, chiefly through the agency of the smaller bees, a single row of slender, brownish, persistent bristles attached to the seeds transforms the head into the "devil's paint-brush." Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Choosing the 20 or 30 best specimens in the seed-pan, no further selection was required, and the whole lot could be left to cross-fertilization by insects. Species and Varieties, Their Origin by Mutation Who can suppose that such a costly process as this, and that all the exquisite arrangements for cross-fertilization in hermaphrodite plants, do not subserve some most important purpose? Darwiniana; Essays and Reviews Pertaining to Darwinism Knight, Andrew: —On the divination of flowers, 108; theory of cross-fertilization, 115. My Studio Neighbors If we now imitate with a probe the habit of the insect and the action of its tongue, we may witness a beautiful contrivance for cross-fertilization. My Studio Neighbors Thus cross-fertilization is commonly effected; but in the absence of insects the lily can fertilize itself. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors So it is also with lata, which is pistillate and can only be propagated by cross-fertilization. Species and Varieties, Their Origin by Mutation "Origin of Species": —First important presentation of the theory of cross-fertilization, 105; tardy appreciation of the work, 115. My Studio Neighbors Simultaneous cross-fertilization of many florets must be effected by every visitor crawling over a cluster. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The nectary now drained of its sweets, the moth creeps or flutters to a second blossom, and its pollen-dusted body thus coming in contact with its stigma, cross-fertilization is accomplished. My Studio Neighbors The anthers, maturing first, compel cross-fertilization which accounts for the plant's vigor and its aggressive march across the continent. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Only by cross-fertilization does O. lata produce seeds, and then as freely as the other species when self-fertilized. Species and Varieties, Their Origin by Mutation Few flowers, sometimes only one opens on a spike on a given evening - a plan to increase the chances of cross-fertilization between distinct plants; but there is a very long succession of bloom. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors What an unworthy relative of the purple loosestrife, whose elaborate scheme to insure cross-fertilization is one of the botanical wonders! Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors I had never chanced to read of this flower in the literature of cross-fertilization, and murmuring, half aloud, "What pretty mystery is yours, my Collinsonia?" prepared to investigate. My Studio Neighbors 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 If the offspring shows more than one type, cross-fertilization is always to be looked to as the most probable cause, and should be excluded, in order to sow pure seeds. Species and Varieties, Their Origin by Mutation In these showy magenta flowers, about one inch across, the stigmas and anthers mature simultaneously but cross-fertilization is usually insured because the former surpass the latter, and naturally are first touched by the insect visitor. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors To insure cross-fertilization, some of the bladder-campion flowers have stamens only, some have a pistil only; some have both organs maturing at different times. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors The ring of pollen is inevitably scattered to the stigmas of the neighboring flowers, and cross-fertilization continually insured. My Studio Neighbors These little blossoms, barely half an inch long, with their ingenious mechanism to compel cross-fertilization, repay the closest study. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Other plants need cross-fertilization in order to produce a normal yield of seeds. Species and Varieties, Their Origin by Mutation On entering it a bee must first touch the stigma before any fresh golden pollen is released from the anther cone, and cross-fertilization naturally results. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors And as all the flowers on any one plant are of the same kind, we have here a marvelous mechanism to secure cross-fertilization. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors Pogonia The numerous and conclusive demonstrations of Darwin, however, have proved that in the competition for existence such self-fertilized offspring quickly yield before the progeny of cross-fertilization. My Studio Neighbors Thus cross-fertilization is absolutely essential, and in three-formed flowers there are two chances to one of securing it. Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors |
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