What are two examples of asexual reproduction in many-celled organisms?
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The first example would be "halpodiploidy" that occurs in bees, ants and wasps. In this form of asexual reproduction, females lay unfertilized eggs. The eggs can then hatch without fertilization, giving an asexually produced male, or they can be fertilized by a male, giving a sexually produced female.\n\nA second example would be "parthenogenesis" (Greek for "virgin birth"), seen in some fish, reptiles and amphibians. One commonly studied reptile species, the lizard Cnemidophorus neomexicanus, contains only females. All progeny contain the exact genetic information as its mother, essentially making it a clone. The females still engage in lesbian sexual behavior, which is thought to stimulate the laying of eggs. No genetic information, however, is transferred during this sexual act.\n\nThere are many other examples, and the previous answer touched on a few. I would add that anthrax is a bacterium, and therefore NOT a many-celled organism.
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They aren't asexual, they're hermaphrodites. They can fertilize themselves or slither along side a willing recipient and fertilize him/her. The young are born alive, very small.
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Asexual reproduction  as opposed to the sexual reproduction you and I know..  Usually happens in bacteria through a process known as binary fission.
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The whiptail lizard has asexual reproduction. Check out this web site:\n\nhttp://www.pbs.org/wgbh/evolution/library/01/5/l_015_01.html
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Multicellular organisms
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Haploid cell have only 1 set of Chromosomes(n) Some organisms, when they reproduce asexually, create other organisms, whose cell are haploid. But when they reproduce sexually, the resulting organism is diploid, meaning that it has two sets of chromosomes (2n), once from each parent.\n\nOvum is the female egg (gamete), before fertilization. An ovum is haploid. The zygote is an ovum that has been fertilized with a sperm. The zygote is diploid.\n\nA gene is a sequence in the DNA that codes for something in particular. Chromosome is the continuous strand of DNA, including genes and non-coding sequences.
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Well, technically identical twins are clones and many organisms with asexual reproduction clone themselves, so yes. I think the question should be if an artificial clone can reproduce; but most of them don't even live more than a few days.
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These two processes are mechanisms that increase genetic diversity in organisms that reproduce by sexual reproduction.
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#1)  Primarily by mutation.  A mutation must occur a germ cell (cells that produce sperm and eggs).  This can produce progeny with novel traits.  This is fairly rare event (one out of every billion nucleotides copied during meiosis).  Our body has ways of fixing these errors, but this is the biological basis of evolution.\n#2)  By crossing over.  During meiosis, parental chromosomes will swap pieces with each other.  For example, I used pieces of my mother's chromosome #1 and my father's chromosome #1 when I made the chromosome #1 that I passed to my daughter.  I passed a different combination of pieces to construct a chromosome #1 for my second daughter.\n#3)  By independent assortment during meiosis.  So not only did I make novel chromosomes out of pieces of my parents chromosomes, but I created a gamete using a unique combination of my mother and father's chromosomes.  For example I might have used chromosomes 1-11 of my father's (with pieces of my mother's chromosomes 1-11) and numbers 12-22 of my mother's (with pieces of my father's chromosomes 12-22).  For my second daughter it could have been totally different.  It is a unique situation each time!  No two gametes are the same.
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Hi Erica, \n\nI'd waste both your and my time if I try to answer this question with lots of detail. I'd suggest you go to your textbook, flip a few pages here and there, get a broad idea and then, come back and read this answer. \n\nPlease notice that I'll have to make this answer less complex by generalizing concepts and avoiding some fine details which you can easily read in your textbook.\n\nNow, without wasting much time, here is my answer-\n\n===================\n\nCharacteristics of animal sexual life cycles-\n\n1- Usually, there are two parents- male and female. Both form special haploid cells called gametes by meiosis.\n\n2- Gametes fuse in pairs to form diploid cells called zygotes (fertilization).\n\n3- Repeated mitotic divisions of the zygote forms embryos.\n\n4- And the embryo develops into a new individual.\n\nSooo simple!\n\n====================\n\nCharacteristics of plant sexual life cycles-\n\nIt is same as animal sexual reproduction. Just that the technical terms and the methods of reproduction are a little different in flowering and non-flowering plants. I suggest you to read your textbook for the detailed terminology.\n\nIn plants-\n\n1- Diploid sporophytic cells divide by meiosis to give haploid gametophytic cells.\n\n2- Haploid gametophytic cells from male and female fuse to form the diploid zygote.\n\n3- The zygote then develops into an embryo and then to a full diploid plant body.\n\n* There are lots of finer details like the flowering system in flowering plants: pollens, ovules etc. and sporangia in non-flowering plants. I suggest you to study the life cycles of different bryophytes, gymnospermae and angiospermae to get the idea.\n\n================\n\nCharacteristics of fungal sexual life cycles-\n\n1- It involves fusion of two compatible sex cells/ gametes. The sex organs that produce gametes are called gametangia.\n\n2- The gametangia of fungi are unicellular and are surrounded by a sterile jacket. In fungi, there is a gradual reduction in sexuality from lower to the higher fungi.\n\n3- In the first stage, the cytoplasms of two sex cells fuse with each other but the nuclei do not fuse. The cell is thus called a dikaryon. (Plasmogamy).\n\n4- The nuclei then fuse to form the synkaryon. (Karyogamy).\n\n5- The diploid cell after that, produces haploid nuclei by meiosis.\n\nThere are broadly five types of sexual fusion in fungi.\n\nHere they are-\n1- Planogametic copulation. \nOne or both of the gametes are motile.\n\n2- Gametangial contact. \nThe two gametangia come together and the male gametangia forms a tube through which the male non-motile gamete is sent to the female gametangia.\n\n3- Gametangial copulation. \nThe gametangia themselves fuse together and lose their sexual identities to form zygospore.\n\n4- Spermatization. \nNumerous spore-like minute bodies (spermatia) are sent through various agencies to the receptive hyphae or trychogyne of female gametangium.\n\n5- Somatogamy.\nIn this mode, sex organs are not formed and the fusion occurs two vegetative cells resulting in the formation of dikaryon.\n\n=================\nI hope the above info helps.
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When the egg and the sperm fuse (in sexual reproduction) a single cell is formed.  That cell divides and divides and keeps on dividing until a full sized critter or plant is formed.\n\nSingle celled creatures reproduce by splitting in half to make two new critters.
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In organisms that reproduce only sexually, the mutations in somatic cells normally don't go beyond the individual. But in the case of organisms that can reproduce asexually, by means of divisions of those somatic cells, a mutation in those cells could be passed to the descendants and thus be under the influence of evolutionary forces. \nThat's a common event in plants, especially a type of mutation called polyploidy (multiplication of the entire chromosome set). These types of mutations are also induced by man to obtain new varieties.
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The "Red Queen " theory of why there is sexual reproduction, states that organisms sexually reproduce to vary the immune response to ever changing bacterial and viral evolution, weather natural or artificial selection. You see the asexual organism having great reproductive numbers, this makes vulnerable populations to parasitical attack, hence they clone rapidly. There is also the genetic recombination component that other answers to your question brought up.
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single cell organisms
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asexual reporduction is when the organism simply makes a clone of itself. Sexual reproduction is when there is a joining of sperm and eggs (this can include hermaphrodites because though it is one organism, they have the joining of sperm and egg internally). Both of them have evolutionary value. I think this is a high school question, so your teacher is probably asking which is better at adapting to changing conditions. It is Sexual reporduction because it allows a greater diversity and therefore the species can survive a wider array of conditions. But the sexual reproduction takes a lot of investment to the organism.
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Almost all cells reproduce like amoeba. There are very, very few that do not.\n\nSo take your pick. Turkey stomach cells reproduce like amoeba, pine needle cells reproduce like amoeba, human lung cells reproduce like amoeba.
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Fragmentation or Clonal Fragmentation is a form of asexual reproduction where an organism is split into fragments. The splitting may or may not be intentional. Each of these fragments develop into mature, fully grown individuals that are a clone of the original organism. If the organism is split any further the process is repeated.\n\nFragmentation is seen in organisms such as molds, some annelid worms, and starfish.\n\nMolds, yeast, and mushrooms, all of which are part of the Fungi kingdom, produce tiny filaments called hyphae. These hyphae obtain food and nutrients from the body of other organisms to grow and fertilize. Then a piece of hyphae breaks off and grows into a new individual and the cycle continues.