eggs of insects,birds, embryo formation in human up to parturation, fertilization in human,
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Do your own homework.
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I am unaware of the existence of human breeding papers. Tell me more if they actually do.
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The word you are looking for is 'parthenogenesis', which is defined as the development of an egg into an embryo without the participation of a sperm.\n\nIn fact, many invertebrates, and even some vertebrates do this.
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1) 2 Cells w/ the same no. of Chromosomes\n2) They align their kinetochores to the equitorial plane when the spindel fibers form and split - Metaphase adn anaphase\n3) Spermatogenesis and Oogenesis are the only reproductive processes
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Mosquito or frog eggs
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egg the proccesses of evolution take place in the next generation of a species
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A fertilized egg will develop and grow and one day enter the world where it will be given a name. \n\nAnyone can argue that it is not human until it breathes but, even they must admit by aborting the fetus it is prevented from being born. \n\nA fetus has a heartbeat. Abortion stops that heartbeat. Think about it.
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yes because the egg comes from the ovary during the menstrual cycle
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Well, the very basic need of developing embryos are food, water and protection.\nFood is usually provided as vitellum (egg yolk) in most vertebrates (including most fishes), although humans as placental mammals have done without the yolk and have a placenta through which the embryo gets nutrients from the mother.\nIn plants, the seed is an embryo with (usually) large amounts of food. Plant nutrients may be present as carbohydrates (starch, sugars, as in corn seeds), lipids (oils, as in peanut seeds) or even proteins (some beans such as soy).\n\nThe embryo of vertebrates needs to be protected within an aquatic medium, thus eggs either develop in water (as in fishes) or develop inside a capsule/eggshell/body cavity that has water (such as the amniotic sac within the womb in mammals). They also get water from their environment, their mother (in the case of viviparous animals) or metabolism of their food reserves.\n\nPlant embryos are able to extract water from their environment and also partly by metabolization of nutrients.  \n\nProtection is given by rigid shells or other covers that are usually provided by the parent organism, and sometimes (as in the case of the extraembryonic membranes of mammals and others) formed by the developing new being itself.\n\nThese are just some basic points, I hope it helps you to find more information in your textbooks.
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Start here and branch out:\nhttp://www.lib.uiowa.edu/hardin/md/insectpictures.html
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In vitro fertilization
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egg... there are fish eggs before chicken eggs
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In humans, the period when ovulation occurs is called the ovulatory phase, and it occupies the fourteenth day of an idealized twenty-eight day menstrual cycle. Because of the variable nature of the menstrual cycle in vivo, however, normal ovulation can occur as early as day 8 or as late as day 20 and beyond. A woman with a particularly short cycle will ovulate earlier while a woman with a long cycle will ovulate later. In humans, concealed ovulation means that the female shows few visible signs of being fertile, compared to most species.(disputed — see talk page) There are evolutionary analyses of how this could evolve in terms of evolutionary game theory.\n\nBefore ovulation, the ovarian follicle will undergo a series of transformations that are necessary for the ovum to survive afterwards. This process is called cumulus expansion. After this is done, a hole called the stigma will form in the follicle, and the ovum will leave the follicle through this hole. It will then enter the fallopian tubes and travel toward the uterus, implanting there 6-12 days later if fertilized, or degrading in the fallopian tubes within 24 hours if not fertilized.\n\nThe ovulatory phase is preceded by the follicular phase, where an immature follicle-encased ovum completes growing, and followed by the luteal phase, where the uterus is prepared to receive the fertilized ovum. The complete process of follicle growth leading up to ovulation is known as folliculogenesis.\n\nScientific investigations like [1] have indicated that the olfactory acuity or the sense of smell is greatest during ovulation in women.\n\n[edit]\nA closer look at the process\nStrictly defined, the ovulatory phase spans the period of hormonal elevation in the menstrual cycle. The process requires a maximum of thirty-six hours to complete, and it is arbitrarily separated into three phases: periovulatory, ovulatory, and postovulatory.\n\n[edit]\nPrerequisite events\n \nHistology of the preovulatory follicleMain page: folliculogenesis\n\nThrough a process that takes approximately 375 days, or thirteen menstrual cycles, a large group of undeveloped primordial follicles dormant in the ovary is grown and progressively weaned into one preovulatory follicle. Histologically, the preovulatory follicle (also called a mature Graffian follicle or mature tertiary follicle) contains an oocyte arrested in prophase of meiosis I surrounded by a layer corona radiata granulosa cells, a layer of mural granulosa cells, a protective basal lamina, and a network of blood-carrying capillary vessels sandwiched between a layer of theca interna and theca externa cells. A large sac of fluid called the antrum predominates in the follicle. A "bridge" of cumulus oophorous granulosa cells (or simply cumulus cells) connects the corona-ovum complex to the mural granulosa cells.\n\nSimply stated, the granulosa cells engage in bidirectional messenging with the theca cells and the oocyte to facilitate follicular function. Research is elucidating the specific factors used in follicular messenging at a rapid pace, but such discussion is beyond the scope of this article.\n\nBy the action of luteinizing hormone (LH), the preovulatory follicle's theca cells secrete androstenedione that is aromatized by mural granulosa cells into estradiol, a type of estrogen. High levels of estrogen have a stimulatory effect on hypothalamus gonadotropin-releasing hormone (GnRH) that in turn stimulates the expression of pituitary LH and follicle stimulating hormone (FSH).\n\nThe building concentrations of LH and FSH marks the beginning of the periovulatory phase.\n\n[edit]\nPeriovulatory phase\nFor ovulation to be successful, the ovum must be supported by both the corona radiata and cumulus oophorous granulosa cells. The latter undergo a period of proliferation and mucification known as cumulus expansion. Mucification refers to the secretion of a hyaluronic acid-rich cocktail that disperses and suspends the cumulus cell networ
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Actually this has a real answer. According to the book "Random Kinds of Factness: 1001 (or so) Absolutely True Tidbits About (mostly) Everything" by Erin Barrett and Jack Mingo the egg came first.\n\nAccording to their research chickens evolved from early Indochina birds called red jungle fowl. Mutations in the jungle fowls eggs produced things more like chickens...these bred with other bird causing more mutations producing todays chicken.\n\nSo the eggs have it!
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After Meiosis four gametes are produces which fertilize and a new organism is formed.\nThis is the most basic answer
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sexual..eggs and sperm\nasexual..fission and cell splitting
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when the sperm fertilizes the egg