英语词汇“dimorphic”造句的方法、技巧、例句及翻译-英语例句辞典

These come in two "dimorphic" sizes, "small worker cells and large reproductive cells, which forces the builders to join differently sized hexagons," the authors explain. Hexagon heaven: Scientists reveal bees and wasps use the same math to build their nests 2023-07-27T04:00:00Z

Some fungi are dimorphic because they can go from being unicellular to multicellular depending on environmental conditions. Concepts of Biology 2013-04-25T00:00:00Z

Hence it has seemed to many ornithologists who have studied the subject, that these two birds, so long unhesitatingly regarded as distinct species, are only local races of one and the same dimorphic species. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z

Regarding sexual dimorphism in extant ungulates, see our paper – we have some discussion of dimorphic horn morphology in bovids. Did dinosaurs and pterosaurs practise mutual sexual selection? 2012-01-05T15:45:07.957Z

Some entomologists have thought them simply varieties or dimorphic forms while others have considered them hybrids. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z

This is no great surprise, since it is usually the male of any dimorphic species who is encumbered with any expensive ornamentation. Palaeontology: Unscrambled eggs 2011-01-20T14:10:58Z

Fritz Müller has described a remarkable dimorphic species of Tanais, in which the male is represented by two distinct forms, never graduating into each other. The Descent of Man and Selection in Relation to Sex, Vol. I 2011-01-17T03:00:49.523Z

The two basal blooms are dissimilar or dimorphic both in shape and colour, being tawny yellow spotted with purple. Orchids

Caterpillars and pupae are also commonly dimorphic, green and brown. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher"

As in the species previously described the spermatozoa are evidently dimorphic. Studies in Spermatogenesis Part II

Almost at the same time, and in following years, he wrote papers for the Linnean Society on dimorphic and trimorphic forms of flowers, and their bearing on the question of cross-fertilisation. The Coming of Evolution The Story of a Great Revolution in Science

The shrub produces dimorphic branches, i.e., branches of two forms, known as uprights and laterals. All About Coffee

I have shown, however, that P. Romulus is probably a dimorphic form of the female P. Pammon, and belongs to a distinct section of the genus. Contributions to the Theory of Natural Selection A Series of Essays

Experiments with North American dimorphic species have given similar results. The Life-Story of Insects

In all of these insects the spermatozoa are distinctly dimorphic, forming two equal classes, one of which either contains one smaller chromosome or lacks one chromosome. Studies in Spermatogenesis Part II

With respect to dimorphic plants: it is a great puzzle, but I fancy I partially see my way—too long for a letter and too speculative for publication. Alfred Russel Wallace: Letters and Reminiscences, Vol. 1

But sometimes these dimorphic species are seen to revert to the primary condition, developing a fertile cone at the summit of the green summer-stem. Species and Varieties, Their Origin by Mutation

In this case, as in the last, distinct species, local forms, and dimorphic specimens, have been confounded under the common appellation of varieties. Contributions to the Theory of Natural Selection A Series of Essays

Fagopyrum is dimorphic, and Anagallis collina is non-dimorphic, and the crossed seedlings of both are in height to the self-fertilised as 100 to 69. Effects of Cross and Self Fertilisation in the Vegetable Kingdom

The benefit which heterostyled dimorphic plants derive from the existence of the two forms is sufficiently obvious, namely, the intercrossing of distinct plants being thus ensured. The Different Forms of Flowers on Plants of the Same Species

WEISMANN, Prof., reversion from unnatural conditions. -isolation. -dimorphic butterflies. -causes of variability. The Variation of Animals and Plants under Domestication — Volume 2

What I meant in my paper on Linum about plants being dimorphic in function alone, was that they should be divided into two equal bodies functionally but not structurally different. More Letters of Charles Darwin — Volume 2

By the way, my notions on hybridity are becoming considerably altered by my dimorphic work. More Letters of Charles Darwin — Volume 1

These latter plants cannot fail to act on each other like dimorphic or trimorphic species, in which the union of two individuals is necessary for full and normal fertility. Effects of Cross and Self Fertilisation in the Vegetable Kingdom

With dimorphic species two illegitimate unions, and with trimorphic species twelve are possible. The Different Forms of Flowers on Plants of the Same Species

After arriving at these conclusions, I was led to investigate a subject which throws considerable light on hybridism, namely, the fertility of heterostyled or dimorphic and trimorphic plants, when illegitimately united. The Variation of Animals and Plants under Domestication — Volume 2

I have not heard of any dimorphic species in this family. More Letters of Charles Darwin — Volume 2

Fritz Muller has described a remarkable dimorphic species of Tanais, in which the male is represented by two distinct forms, which never graduate into each other. The Descent of Man

I suspected, therefore, but erroneously as it proved, that this plant was dimorphic, like Primula, Linum, etc., and in the year 1862 twelve plants, covered by a net in the greenhouse, were subjected to trial. Effects of Cross and Self Fertilisation in the Vegetable Kingdom

We shall hereafter see that this cultivated plant varies much in its dimorphic condition and is often equal-styled. The Different Forms of Flowers on Plants of the Same Species

Indeed, any dried dimorphic plants would be gratefully received… Did my Lythrum paper interest you? Life and Letters of Charles Darwin — Volume 2

I may mention that our common O. acetosella varies much in length of pistils and stamens, so that I at first thought it was certainly dimorphic, but proved it by experiment not to be so. More Letters of Charles Darwin — Volume 2

Herons, love-gestures of; decomposed feathers in; breeding plumage of; young of the; sometimes dimorphic; continued growth of crest and plumes in the males of some; change of colour in some. The Descent of Man

So that with dimorphic species two unions, which may be called legitimate, are fully fertile; and two, which may be called illegitimate, are more or less infertile. The Origin of Species by means of Natural Selection, 6th Edition

But the results are much more complicated than with ordinary plants, as two heterostyled dimorphic species can be intercrossed in eight different ways. The Different Forms of Flowers on Plants of the Same Species

I should be very glad to get some seed of your dimorphic Plantagos; for I cannot banish the suspicion that they must belong to a very different class like that of the common Thyme. Life and Letters of Charles Darwin — Volume 2

What a number of dimorphic plants South Brazil produces: you observed in one day as many or more dimorphic genera than all the botanists in Europe have ever observed. More Letters of Charles Darwin — Volume 2

The same rule applies to the two illegitimate unions of some dimorphic species, namely, Primula vulgaris and Pulmonaria angustifolia; but it entirely fails in other cases, as with Hottonia palustris and Linum grandiflorum. The Different Forms of Flowers on Plants of the Same Species

So it is with the reciprocally dimorphic and trimorphic plants previously alluded to. The Origin of Species by means of Natural Selection, 6th Edition

This form, according to Vaucher, is dimorphic, like Primula, and therefore presents only two forms. The Different Forms of Flowers on Plants of the Same Species

I have lately investigated the cases of dimorphic plants, and I should much like to send you one or two of my papers if I knew how. Life and Letters of Charles Darwin — Volume 2

Some dimorphic plant will probably prove too sterile for you to raise offspring; and others too fertile for much sterility to be expected in their offspring. More Letters of Charles Darwin — Volume 2

Nature of the offspring from illegitimately fertilised dimorphic plants. The Different Forms of Flowers on Plants of the Same Species

So it is, as I have myself observed, with some dimorphic plants. The Origin of Species by means of Natural Selection, 6th Edition

This species is said by Vaucher, but I believe erroneously, to be dimorphic. The Different Forms of Flowers on Plants of the Same Species

How could the wind, which is the agent of fertilisation, with Plantago, fertilise "reciprocally dimorphic" flowers like Primula? Life and Letters of Charles Darwin — Volume 2

Firstly, the red cowslip, losing its dimorphic structure and changing so extraordinarily in its great production of seed with its own pollen, especially being nearly sterile when fertilised by, or fertilising, the common cowslip. More Letters of Charles Darwin — Volume 2

The tendency of the dimorphic species of Primula to produce equal-styled varieties deserves notice. The Different Forms of Flowers on Plants of the Same Species

On the other hand, with heterostyled dimorphic species there are two females and two sets of males, and with trimorphic species three females and three sets of males, which differ essentially in their sexual powers. The Different Forms of Flowers on Plants of the Same Species

And now we see that this same conclusion is independently and strongly fortified by the consideration of the illegitimate unions of trimorphic and dimorphic heterostyled plants. The Different Forms of Flowers on Plants of the Same Species

The occurrence of dimorphic and non-dimorphic species in the same genus is quite the same as I find in Linum. More Letters of Charles Darwin — Volume 2

The cases of the Primulae which lose by variation their dimorphic characters seem to me very interesting. More Letters of Charles Darwin — Volume 2

Hottonia is dimorphic, with pollen of very different sizes in the two forms. More Letters of Charles Darwin — Volume 2

Now when you have completed your work you should draw up a paper, well worth publishing, and give a list of all the dimorphic and non-dimorphic forms. More Letters of Charles Darwin — Volume 2

Moreover, trimorphic plants evidently come under the same category with dimorphic, and the former cannot be looked at as tending to become dioecious. The Different Forms of Flowers on Plants of the Same Species

If you can find a dimorphic Oxalis it will be a new point, for all known species are trimorphic or monomorphic. More Letters of Charles Darwin — Volume 2

All dimorphic and trimorphic plants present such difference in function and in size. More Letters of Charles Darwin — Volume 2

单词	dimorphic
例句	dimorphic These come in two "dimorphic" sizes, "small worker cells and large reproductive cells, which forces the builders to join differently sized hexagons," the authors explain. Hexagon heaven: Scientists reveal bees and wasps use the same math to build their nests 2023-07-27T04:00:00Z Some fungi are dimorphic because they can go from being unicellular to multicellular depending on environmental conditions. Concepts of Biology 2013-04-25T00:00:00Z Hence it has seemed to many ornithologists who have studied the subject, that these two birds, so long unhesitatingly regarded as distinct species, are only local races of one and the same dimorphic species. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Regarding sexual dimorphism in extant ungulates, see our paper – we have some discussion of dimorphic horn morphology in bovids. Did dinosaurs and pterosaurs practise mutual sexual selection? 2012-01-05T15:45:07.957Z Some entomologists have thought them simply varieties or dimorphic forms while others have considered them hybrids. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z This is no great surprise, since it is usually the male of any dimorphic species who is encumbered with any expensive ornamentation. Palaeontology: Unscrambled eggs 2011-01-20T14:10:58Z Fritz Müller has described a remarkable dimorphic species of Tanais, in which the male is represented by two distinct forms, never graduating into each other. The Descent of Man and Selection in Relation to Sex, Vol. I 2011-01-17T03:00:49.523Z The two basal blooms are dissimilar or dimorphic both in shape and colour, being tawny yellow spotted with purple. Orchids Caterpillars and pupae are also commonly dimorphic, green and brown. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" As in the species previously described the spermatozoa are evidently dimorphic. Studies in Spermatogenesis Part II Almost at the same time, and in following years, he wrote papers for the Linnean Society on dimorphic and trimorphic forms of flowers, and their bearing on the question of cross-fertilisation. The Coming of Evolution The Story of a Great Revolution in Science The shrub produces dimorphic branches, i.e., branches of two forms, known as uprights and laterals. All About Coffee I have shown, however, that P. Romulus is probably a dimorphic form of the female P. Pammon, and belongs to a distinct section of the genus. Contributions to the Theory of Natural Selection A Series of Essays Experiments with North American dimorphic species have given similar results. The Life-Story of Insects In all of these insects the spermatozoa are distinctly dimorphic, forming two equal classes, one of which either contains one smaller chromosome or lacks one chromosome. Studies in Spermatogenesis Part II With respect to dimorphic plants: it is a great puzzle, but I fancy I partially see my way—too long for a letter and too speculative for publication. Alfred Russel Wallace: Letters and Reminiscences, Vol. 1 But sometimes these dimorphic species are seen to revert to the primary condition, developing a fertile cone at the summit of the green summer-stem. Species and Varieties, Their Origin by Mutation In this case, as in the last, distinct species, local forms, and dimorphic specimens, have been confounded under the common appellation of varieties. Contributions to the Theory of Natural Selection A Series of Essays Fagopyrum is dimorphic, and Anagallis collina is non-dimorphic, and the crossed seedlings of both are in height to the self-fertilised as 100 to 69. Effects of Cross and Self Fertilisation in the Vegetable Kingdom The benefit which heterostyled dimorphic plants derive from the existence of the two forms is sufficiently obvious, namely, the intercrossing of distinct plants being thus ensured. The Different Forms of Flowers on Plants of the Same Species WEISMANN, Prof., reversion from unnatural conditions. -isolation. -dimorphic butterflies. -causes of variability. The Variation of Animals and Plants under Domestication — Volume 2 What I meant in my paper on Linum about plants being dimorphic in function alone, was that they should be divided into two equal bodies functionally but not structurally different. More Letters of Charles Darwin — Volume 2 By the way, my notions on hybridity are becoming considerably altered by my dimorphic work. More Letters of Charles Darwin — Volume 1 These latter plants cannot fail to act on each other like dimorphic or trimorphic species, in which the union of two individuals is necessary for full and normal fertility. Effects of Cross and Self Fertilisation in the Vegetable Kingdom With dimorphic species two illegitimate unions, and with trimorphic species twelve are possible. The Different Forms of Flowers on Plants of the Same Species After arriving at these conclusions, I was led to investigate a subject which throws considerable light on hybridism, namely, the fertility of heterostyled or dimorphic and trimorphic plants, when illegitimately united. The Variation of Animals and Plants under Domestication — Volume 2 I have not heard of any dimorphic species in this family. More Letters of Charles Darwin — Volume 2 Fritz Muller has described a remarkable dimorphic species of Tanais, in which the male is represented by two distinct forms, which never graduate into each other. The Descent of Man I suspected, therefore, but erroneously as it proved, that this plant was dimorphic, like Primula, Linum, etc., and in the year 1862 twelve plants, covered by a net in the greenhouse, were subjected to trial. Effects of Cross and Self Fertilisation in the Vegetable Kingdom We shall hereafter see that this cultivated plant varies much in its dimorphic condition and is often equal-styled. The Different Forms of Flowers on Plants of the Same Species Indeed, any dried dimorphic plants would be gratefully received… Did my Lythrum paper interest you? Life and Letters of Charles Darwin — Volume 2 I may mention that our common O. acetosella varies much in length of pistils and stamens, so that I at first thought it was certainly dimorphic, but proved it by experiment not to be so. More Letters of Charles Darwin — Volume 2 Herons, love-gestures of; decomposed feathers in; breeding plumage of; young of the; sometimes dimorphic; continued growth of crest and plumes in the males of some; change of colour in some. The Descent of Man So that with dimorphic species two unions, which may be called legitimate, are fully fertile; and two, which may be called illegitimate, are more or less infertile. The Origin of Species by means of Natural Selection, 6th Edition But the results are much more complicated than with ordinary plants, as two heterostyled dimorphic species can be intercrossed in eight different ways. The Different Forms of Flowers on Plants of the Same Species I should be very glad to get some seed of your dimorphic Plantagos; for I cannot banish the suspicion that they must belong to a very different class like that of the common Thyme. Life and Letters of Charles Darwin — Volume 2 What a number of dimorphic plants South Brazil produces: you observed in one day as many or more dimorphic genera than all the botanists in Europe have ever observed. More Letters of Charles Darwin — Volume 2 The same rule applies to the two illegitimate unions of some dimorphic species, namely, Primula vulgaris and Pulmonaria angustifolia; but it entirely fails in other cases, as with Hottonia palustris and Linum grandiflorum. The Different Forms of Flowers on Plants of the Same Species So it is with the reciprocally dimorphic and trimorphic plants previously alluded to. The Origin of Species by means of Natural Selection, 6th Edition This form, according to Vaucher, is dimorphic, like Primula, and therefore presents only two forms. The Different Forms of Flowers on Plants of the Same Species I have lately investigated the cases of dimorphic plants, and I should much like to send you one or two of my papers if I knew how. Life and Letters of Charles Darwin — Volume 2 Some dimorphic plant will probably prove too sterile for you to raise offspring; and others too fertile for much sterility to be expected in their offspring. More Letters of Charles Darwin — Volume 2 Nature of the offspring from illegitimately fertilised dimorphic plants. The Different Forms of Flowers on Plants of the Same Species So it is, as I have myself observed, with some dimorphic plants. The Origin of Species by means of Natural Selection, 6th Edition This species is said by Vaucher, but I believe erroneously, to be dimorphic. The Different Forms of Flowers on Plants of the Same Species How could the wind, which is the agent of fertilisation, with Plantago, fertilise "reciprocally dimorphic" flowers like Primula? Life and Letters of Charles Darwin — Volume 2 Firstly, the red cowslip, losing its dimorphic structure and changing so extraordinarily in its great production of seed with its own pollen, especially being nearly sterile when fertilised by, or fertilising, the common cowslip. More Letters of Charles Darwin — Volume 2 The tendency of the dimorphic species of Primula to produce equal-styled varieties deserves notice. The Different Forms of Flowers on Plants of the Same Species On the other hand, with heterostyled dimorphic species there are two females and two sets of males, and with trimorphic species three females and three sets of males, which differ essentially in their sexual powers. The Different Forms of Flowers on Plants of the Same Species And now we see that this same conclusion is independently and strongly fortified by the consideration of the illegitimate unions of trimorphic and dimorphic heterostyled plants. The Different Forms of Flowers on Plants of the Same Species The occurrence of dimorphic and non-dimorphic species in the same genus is quite the same as I find in Linum. More Letters of Charles Darwin — Volume 2 The cases of the Primulae which lose by variation their dimorphic characters seem to me very interesting. More Letters of Charles Darwin — Volume 2 Hottonia is dimorphic, with pollen of very different sizes in the two forms. More Letters of Charles Darwin — Volume 2 Now when you have completed your work you should draw up a paper, well worth publishing, and give a list of all the dimorphic and non-dimorphic forms. More Letters of Charles Darwin — Volume 2 Moreover, trimorphic plants evidently come under the same category with dimorphic, and the former cannot be looked at as tending to become dioecious. The Different Forms of Flowers on Plants of the Same Species If you can find a dimorphic Oxalis it will be a new point, for all known species are trimorphic or monomorphic. More Letters of Charles Darwin — Volume 2 All dimorphic and trimorphic plants present such difference in function and in size. More Letters of Charles Darwin — Volume 2
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