| 单词 | asexual reproduction |
| 例句 | Among other things, he discovered the asexual reproduction of male bees -- the "drones." Proteins roll the dice to determine bee sex 2023-10-04T04:00:00Z It's the first time scientists have recorded in an American crocodile successful parthenogenesis, which is asexual reproduction and Greek for "virgin birth." Why a crocodile’s ‘virgin birth’ isn’t a miracle 2023-06-10T04:00:00Z Virgin births are a form of asexual reproduction as they do not require genetic information from sperm. Crocodile’s ‘Virgin Birth’ Is a First for Science’s History Books 2023-06-09T04:00:00Z After discovering that he could stimulate asexual reproduction by treating unfertilized sea urchin eggs with simple salt solutions, he became convinced that nature's way of doing things with living matter is not the only way. Synthetic Morphology Lets Scientists Create New Life-Forms 2023-05-31T04:00:00Z An atypical type of asexual reproduction is found only in freshwater sponges and occurs through the formation of gemmules. Gemmules are environmentally resistant structures produced by adult sponges wherein the typical sponge morphology is inverted. Fundamentals of Biology 2015-01-01T00:00:00Z They may even be involved in asexual reproduction in some organisms. Concepts of Biology 2013-04-25T00:00:00Z While female asexual reproduction could be a clever way of nature surviving a tough time, some researchers believe that it actually could be self-sabotaging. Why a crocodile’s ‘virgin birth’ isn’t a miracle 2023-06-10T04:00:00Z But, unlike other forms of asexual reproduction, they need an egg. Crocodile’s ‘Virgin Birth’ Is a First for Science’s History Books 2023-06-09T04:00:00Z These budding plants demonstrate asexual reproduction, one of the main purposes of mitosis. Biology for AP Courses 2022-06-09T00:00:00Z These types of asexual reproduction produce genetically identical offspring, which is disadvantageous from the perspective of evolutionary adaptability because of the potential buildup of deleterious mutations. Fundamentals of Biology 2015-01-01T00:00:00Z It is possible that the asexual reproduction observed occurred in response to unusual circumstances and would normally not occur. Concepts of Biology 2013-04-25T00:00:00Z Mitosis can be a form of asexual reproduction. Miller & Levine Biology 2018-01-01T00:00:00Z Some species, termed facultative parthenogens, alternate between sexual and asexual reproduction. Crocodile’s ‘Virgin Birth’ Is a First for Science’s History Books 2023-06-09T04:00:00Z Recent advances in biotechnology have made it possible to artificially induce asexual reproduction of mammals in the laboratory. Biology for AP Courses 2022-06-09T00:00:00Z In both sexual and asexual reproduction, fungi produce spores that disperse from the parent organism by either floating on the wind or hitching a ride on an animal. Fundamentals of Biology 2015-01-01T00:00:00Z Most are capable some form of asexual reproduction, such as binary fission to produce two daughter cells, or multiple fission to divide simultaneously into many daughter cells. Concepts of Biology 2013-04-25T00:00:00Z In addition, asexual reproduction allows a single plant to produce genetically identical offspring. Miller & Levine Biology 2018-01-01T00:00:00Z The discovery that condors are capable of virgin births - formally called parthenogenesis or asexual reproduction - surprised scientists. California condors: Virgin births discovered in critically endangered birds 2021-10-29T04:00:00Z Parthenogenesis, or “virgin birth,” occurs when an embryo grows and develops without the fertilization of the egg occurring; this is a form of asexual reproduction. Biology for AP Courses 2022-06-09T00:00:00Z The Deuteromycota is an informal group of unrelated fungi that all share a common character – they use strictly asexual reproduction. Fundamentals of Biology 2015-01-01T00:00:00Z In both sexual and asexual reproduction, fungi produce spores that disperse from the parent organism by either floating in the wind or hitching a ride on an animal. Concepts of Biology 2013-04-25T00:00:00Z The advantages of asexual reproduction include quick and successful reproduction when conditions are ideal, which allows offspring to survive when in competition with other organisms. Miller & Levine Biology 2018-01-01T00:00:00Z This sort of asexual reproduction, known as parthenogenesis, is a first for the species and provides new hope for their recovery. California condors: Virgin births discovered in critically endangered birds 2021-10-29T04:00:00Z Spores are haploid cells formed only during asexual reproduction and so are not formed by meiosis. Biology for AP Courses 2022-06-09T00:00:00Z Most undergo some form of asexual reproduction, such as binary fission, to produce two daughter cells. Fundamentals of Biology 2015-01-01T00:00:00Z An older classification scheme grouped fungi that strictly use asexual reproduction into Deuteromycota, a group that is no longer in use. Concepts of Biology 2013-04-25T00:00:00Z When DNA replication is complete, the cell divides by binary fission, which is a form of asexual reproduction. Miller & Levine Biology 2018-01-01T00:00:00Z It’s the first report of asexual reproduction in California condors, although parthenogenesis can occur in other species, including sharks, honey bees and Komodo dragons. Study finds California condors can have ‘virgin births’ 2021-10-28T04:00:00Z On the other hand, the rapid rates of asexual reproduction may allow a speedy response to changing environmental conditions. Biology for AP Courses 2022-06-09T00:00:00Z In contrast, asexual reproduction generates progeny that are clones of the parent. Fundamentals of Biology 2015-01-01T00:00:00Z This distinguishes animals from fungi, protists, and bacteria, where asexual reproduction is common or exclusive. Concepts of Biology 2013-04-25T00:00:00Z In asexual reproduction, the new organism has a single parent. Miller & Levine Biology 2018-01-01T00:00:00Z The researchers said they believe it is the first case of asexual reproduction in any avian species where the female had access to a mate. Study finds California condors can have ‘virgin births’ 2021-10-28T04:00:00Z For example, in many sea stars, asexual reproduction is accomplished by fragmentation. Biology for AP Courses 2022-06-09T00:00:00Z Apicomplexan life cycles are complex, involving multiple hosts and stages of sexual and asexual reproduction. Fundamentals of Biology 2015-01-01T00:00:00Z A number of animal species—especially those without backbones, but even some fish, amphibians, and reptiles—are capable of asexual reproduction. Concepts of Biology 2013-04-25T00:00:00Z Both sexual and asexual reproduction result in new individuals. Miller & Levine Biology 2018-01-01T00:00:00Z The asexual reproduction was discovered some years ago during widespread testing of genetic material collected over decades from condors, both living and dead, in breeding programs and in the wild. Study finds California condors can have ‘virgin births’ 2021-10-28T04:00:00Z Binary fission is a method of asexual reproduction. Biology for AP Courses 2022-06-09T00:00:00Z In asexual reproduction, part of the parent plant is used to generate a new plant. Fundamentals of Biology 2015-01-01T00:00:00Z The most common forms of asexual reproduction for stationary aquatic animals include budding and fragmentation, in which part of a parent individual can separate and grow into a new individual. Concepts of Biology 2013-04-25T00:00:00Z First, parthenogenesis, a system of asexual reproduction usually found in insects, lizards and plants. Virgin births: is there something fishy about Mary the stickleback’s little miracles? 2019-02-20T05:00:00Z Evolutionary theory suggests that species favouring asexual reproduction will rapidly become extinct, as their genomes accumulate deadly mutations over time. Amazon fish challenges mutation idea 2018-02-13T05:00:00Z However, multicellular organisms that exclusively depend on asexual reproduction are exceedingly rare. Biology for AP Courses 2022-06-09T00:00:00Z Grafting, layering, and micropropagation are some methods used for artificial asexual reproduction. Fundamentals of Biology 2015-01-01T00:00:00Z A type of asexual reproduction found only in freshwater sponges occurs through the formation of gemmules, clusters of cells surrounded by a tough outer layer. Concepts of Biology 2013-04-25T00:00:00Z About 50 vertebrates are known to use asexual reproduction including fish, amphibians and reptiles. Girl power: life's going swimmingly for all-female fish species 2018-02-12T05:00:00Z In order to multiply, the resulting Amazon molly relies entirely on asexual reproduction; one of only a handful of backboned animals that reproduce this way. Amazon fish challenges mutation idea 2018-02-13T05:00:00Z Mitosis is a process of asexual reproduction in which the number of chromosomes are reduced by half producing two haploid cells whereas in meiosis two diploid cells are produced by cell division. Biology for AP Courses 2022-06-09T00:00:00Z Many different types of roots exhibit asexual reproduction Figure 1. Fundamentals of Biology 2015-01-01T00:00:00Z In a stable or predictable environment, asexual reproduction is an effective means of reproduction because all the offspring will be adapted to that environment. Concepts of Biology 2013-04-25T00:00:00Z About 50 vertebrates are known to use asexual reproduction including fish, amphibians and reptiles. Girl power: life's going swimmingly for all-female fish species 2018-02-12T05:00:00Z In another part of the study, a scientist in Madagascar examined how well the crayfish is able to multiply in the wild via parthenogenesis, a natural form of asexual reproduction. Mutant, all-female crayfish spreading rapidly through Europe can clone itself 2018-02-07T05:00:00Z All yeasts engage in asexual reproduction most of the time. Domesticated tipple 2016-09-08T04:00:00Z However, a few groups, such as cnidarians, flatworm, and roundworms, undergo asexual reproduction, although nearly all of those animals also have a sexual phase to their life cycle. Fundamentals of Biology 2015-01-01T00:00:00Z This is relevant because have a type of tissue called the meristem, which is where plants can sprout and is thereby important for asexual reproduction. Sci-Fi Science: Attack of the Cabbage Clones 2013-03-14T14:15:00.353Z So to find asexual reproduction in two species of snake in the wild on their first attempt was "astounding", according to Prof Booth and his collaborators. Virgin snake births found in wild 2012-09-11T23:45:09Z They traced the ancient lineages of two species to reveal the insects' lengthy history of asexual reproduction. Insect's million sex-free years 2011-07-19T09:23:55Z And most of those seemed to mix sexual and asexual reproduction. 'Asexual' Ants May Be Having Sex After All 2011-07-18T20:00:00Z The most common forms of asexual reproduction for stationary aquatic animals include budding and fragmentation, where part of a parent individual can separate and grow into a new individual. Fundamentals of Biology 2015-01-01T00:00:00Z With certain rare exceptions the Saccharomycetes have three methods of asexual reproduction:— 1. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z It is probable that these three stages of asexual reproduction are not all the steps actually taken by Nature in the development of the early life-process. The Truth About Woman Sexual Generation.—The union of the two sexual elements seems to make a broad distinction between sexual and asexual reproduction. The Variation of Animals and Plants Under Domestication, Volume II (of 2) Gemmiparous: applied to that form of asexual reproduction where new individuals arise as buds from the germ body of the parent. Explanation of Terms Used in Entomology However, for animals that are limited in their capacity to attract mates, asexual reproduction can ensure genetic propagation. Fundamentals of Biology 2015-01-01T00:00:00Z This is asexual reproduction, which means that the multiplication takes place by dividing into two or many portions, and not by liberating egg-cells and sperm-cells. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told After sexual conjugation there was an access of vitality, and the asexual reproduction proceeded as before. Sex and Society In all the different forms of asexual reproduction from fission to parthenogenesis, the female may in this sense be said to exist alone and perform all the functions of life including reproduction. Taboo and Genetics A Study of the Biological, Sociological and Psychological Foundation of the Family Parthenogenesis, name given to asexual reproduction, that is, to reproduction of plants or animals by means of unimpregnated germs or ova. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge An advantage of asexual reproduction is that the resulting plant will reach maturity faster. Fundamentals of Biology 2015-01-01T00:00:00Z Among animals as among plants, asexual reproduction is very common. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told These simplest forms multiply or reproduce by fission, but such asexual reproduction is almost entirely confined to the unicellular forms of life. Sociology and Modern Social Problems Sexual and asexual reproduction are thus seen not to differ essentially; and we have already shown that asexual reproduction, the power of regrowth and development are all parts of one and the same great law. The Variation of Animals and Plants under Domestication — Volume 2 As in the asexual reproduction of algae quantitative alteration in the amount of moisture, light, temperature, etc. determines whether this or that form of shoot is produced. Darwin and Modern Science This fact distinguishes animals from fungi, protists, and bacteria, where asexual reproduction is common or exclusive. Fundamentals of Biology 2015-01-01T00:00:00Z Moreover, if the body of the parent has suffered from injury or deterioration, the result of this is bound to be handed on to the next generation if asexual reproduction is the only method. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told Some animal species—including sea stars and sea anemones, as well as some insects, reptiles, and fish—are capable of asexual reproduction. Fundamentals of Biology 2015-01-01T00:00:00Z It is seen giving off a bud, a clear illustration of asexual reproduction. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told |
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