Search results for "Fertilization" - New World Encyclopedia

contains enzymes that are crucial for fertilization. The sperm cell contains ... During fertilization, the sperm's mitochondria are destroyed ...

It comes on the foundation of the fertilization of gametes and prepares ... is an embryo between the time of fertilization and the time that it ...

develop in the absence of pollination/fertilization, a process known as parthenocarpy ... called a head is produced. After fertilization, each flower develops ...

all the freshwater forms are hermaphroditic. Fertilization is usually external, although some species have both internal fertilization and live birth ...

the child is conceived by in vitro fertilization using the wife's ... quot; surrogacy). Using in vitro fertilization (IVF), the intended parents ...

In sexually reproducing organisms, fertilization of an ovum with a ... beings, approximately 4 days after fertilization and after several cycles ...

begins about seven or eight weeks after fertilization, when the major structures ... human fetus, only eight weeks after fertilization and 1.2 inches in length ...

of chromosomes to produce gametes; and fertilization, involving the fusion ... gametes, it also includes self-fertilization, whereby one organism ...

mouth of the female jelly, allowing the fertilization process of the ova to ... After fertilization and initial growth, a larval form, called the ...

of the flower is that of ensuring fertilization of the ovule and development ... egg (female gamete) and is the site of fertilization. (A single carpel or ...

dispersed across the landscape. After fertilization, portions of the flower ... ===Preventing Self-fertilization=== Some flowers with both stamens ...

into open water. Some sponges have oviparous fertilization where sperm and eggs meet in open water. In other species, sperm are taken into the bodies ...

are released through the mouth for external fertilization or eggs may be retained for internal fertilization and embryos released through the mouth ...

fourth millennium B.C.E. without artificial fertilization. == Problems == Since the construction of the Aswan Dam on the Nile in Egypt, 95 percent ...

antheridia swim to the archegonia and fertilization occurs, leading to the ... the need to go through the cycle of fertilization. This is a means of asexual ...

== Soil fertilization == Soil Fertilization or Crop Fertilization are methods of improving ...

In marine mussels, fertilization occurs outside the body, and there ... female via the incurrent siphon. After fertilization, the eggs develop into ...

unit and produces eggs either by self-fertilization or cross-fertilization with other mature proglottids. It has been suggested by some early ...

===Soil and fertilization=== Opinions about soil mixes and fertilization vary widely among practitioners ...

Fertilization leads to the formation of a zygote. During the next stage, cleavage, mitotic cell divisions transform the zygote into a tiny ball ...

derived from the parent plant via double fertilization. The usually triploid endosperm (containing three sets of chromosomes) is rich in oil or starch ...

eggs and sperm into the water for external fertilization. In some, eggs develop into free-swimming larvae that look very similar to echinoderm larvae ...

Fertilization may take place in the pouch or before implantation in ... into the surrounding sea water during fertilization, and not directly into ...

or appreciated. This musical cross-fertilization would become a hallmark of much of his professional life. ==Biography== Grainger was born in ...

which stimulates females to release eggs, and fertilization occurs. The eggs or sperm are ejected through the mouth. The fertilized egg develops into ...

Category:Politics and social sciences Category:Law Family law is an area of the law that deals with family-related issues and domestic relations ...

from the antheridia swim to the archegonia and fertilization occurs, leading to the production of a diploid sporophyte. After fertilization, the immature ...

The repercussions of self-fertilization in sharks, which reduces the genetic diversity of the offspring, is a matter of concern for shark experts ...

that themselves are necessary for fertilization of the pumpkins. For ... honeybees play a significant role in fertilization (Orzolek et al. 2000 ...

and released into the aquatic environment. Fertilization in sipunculans is external. Once male and female matured gametes meet, a trochopore larva ...

eggs and sperm into the water, with fertilization taking place externally. ==Regeneration== Many echinoderms have remarkable powers of regeneration. ...

The fertilization of ginkgo seeds occurs via motile sperm, as in cycads, ferns, mosses, and algae. The sperm are large (about 250-300 micrometers ...

to the sperm of other species prevent fertilization or embryo development. ... Wider interspecific hybrids can be made via in vitro fertilization ...

an ovum surrounded by a special envelope, the fertilization membrane; the ovum is supplied with nutrients by the surrounding syncytium, allowing energy ...

strategy by females to enhance fertilization while obtaining sustenance. Later, this bizarre behavior appeared to be an artifact of intrusive ...

Gonorrhea is a common, highly contagious, sexually transmitted diseases (STD) that is caused by the Gram-negative bacterium Neisseria gonorrhoeae ...

Herring is the common name for any of the various fish comprising the Clupeiformes family Clupeidae, a large family that includes many of the ...

Quinoa ( ˈkinwɑ KEEN-wah or /ˈkinoʊə/ KEE-no-uh, Spanish quinua) is a tall South American herb, Chenopodium quinoa in the goosefoot genus ...

Snails have small slits on their necks where fertilization occurs and the eggs develop. Garden snails bury their eggs in shallow topsoil primarily ...

society with free mixing and mingling and cross-fertilization. Erskine (2005), 362. While relatively little is known about how the Bosporan Kingdom ...

believed to help sperm motility, and thus, fertilization of an egg, because sperm are more mobile in relatively alkaline medium. This secretion counters ...

starfish being male or female. Fertilization takes place externally, with both male and female releasing their gametes into the environment ...

parent. When a male and a female gamete merge (fertilization), a new diploid organism is formed. Some animal and plant species are polyploid ...

[[Image:EHR-BBII.jpg|thumb|right|300px|At 21 days after [[Fertilization|conception]], the human heart begins beating at 70 to 80 beats per minute ...

legal in every country. Access to in vitro fertilization (IVF) treatments is also the subject of debate in many countries. ==Notes== ...

research, he wrote a paper on artificial fertilization to improve the quality of the plants. During this time his family increased to four daughters and ...

the eggs in the mantle cavity but after fertilization the eggs develop into crawl-away young (Lindberg 2004). Limpets can be long lived, with ...

Broadly defined, wasp is any insect of the order Hymenoptera and suborder Apocrita that is not a bee or ant. This includes more than 20,000 known ...

and others. There has, however, been much cross-fertilization of ideas between the various computer-related disciplines. In addition, computer ...

apogamy) is asexual reproduction, without fertilization. Apomictically produced seeds are genetically identical to the parent plant. As apomictic plants ...

What is the ethical status of in vitro fertilization? Use of fertility drugs that result in multiple pregnancies? Suppose too many multiple ...

Animals that participate in external fertilization, such as marine worms and sea urchins, use pheromones to synchronize the release of gametes ...

Poison dart frog (also poison arrow frog, dart frog, or poison frog) is the common name for any of the very small, diurnal frogs of the Dendrobatidae ...

as a group of organisms that share a common fertilization system and are known to recognize one another as potential mates. Shortcoming: Like the ...

weeks gestational age (six weeks after fertilization).1: Amniotic sac2: Embryo3: ... that human life is assumed to begin at fertilization. The Papal Encyclical ...

peoples began the cross-cultural fertilization that has come to be known ... by Alfred W. Crosby) brought a cross-fertilization that yielded both benefits ...

and Buddhism and encouraged the cross-fertilization of Eastern and Western spirituality. An outspoken critic of the Vietnam War and supporter ...

are severed and sealed in order to prevent fertilization *Ulner Collateral Ligament Reconstruction (UCL) - also known as "Tommy John surgery ...

Anurans utilize mostly external fertilization, while salamanders and caecilians largely reproduce internally. For the purpose of reproduction ...

As a result of long periods of cross-cultural fertilization and dialogue, the various Kingdoms of Gandhara became centers of learning and education ...

* Kumazawa, K. 2002. Nitrogen fertilization and nitrate pollution in groundwater in Japan: Present status and measures for sustainable agriculture ...

before or during pregnancy. In vitro fertilization with pre-implantation ... Female infertility may be overcome by in vitro fertilization technology ...

mounting the female and gripping her tightly. Fertilization is external: the egg and sperm meet outside of the body. The female releases her eggs, which ...

die at various stages in the IVF (in vitro fertilization) process. Then, says MacIntyre, people need to approach the issue with virtues such as wisdom ...

Category:Politics and social sciences Category:Education [[Image:VictorianPostcard.jpg|thumb|right|350px|Humorous nineteenth century postcard ...

lived in the area. This led to a rapid cross-fertilization of ideas that Read would publicize, helping to raise Moore's public profile. The area ...

Ticks reproduce sexually, use internal fertilization, and are oviparous. Ticks produce a lot of young but the young are not nurtured by the parents. ...

were many other influences and much cross-fertilization between the different traditions, and indeed His Holiness the Dalai Lama has asserted that ...

After fertilization of the oocyte, the early embryo or (syncytial embryo) undergoes rapid DNA replication and 13 nuclear divisions until approximately ...

male may mount repeatedly to ensure successful fertilization. [[Image:Chengdu-pandas-d18.jpg|thumb|right|400px|Newly born giant panda]] ...

spawning. The gametes fuse during fertilization to form a microscopic larva called a planula, typically pink and elliptical in shape. A moderately ...

stem cell research, human cloning, in vitro fertilization, euthanasia, evolution, interfaith matters, and unjust wars. He also defended traditional ...

rooster may mount the hen and proceed with the fertilization. [[Image:Chicken eggs.jpg|thumb|right|250px|Chicken eggs vary in color depending ...

succeed at this, including the use of in-vitro fertilization. Once widely hunted for its fur, the cheetah now suffers more from the loss of both habitat ...

when the zygote is formed through fertilization, becoming an embryo. For others, the view is that a fetus takes on the status of a human being ...

genetic counseling, birth control, in vitro fertilization, and genetic engineering. Opponents argue that eugenics is immoral and is based on, or is itself ...

develop viviparously (live birth) from fertilization of an egg by a sperm ... begins about seven or eight weeks after fertilization, when the major structures ...

The time between egg fertilization and initial emergence of adult physical shape is referred to as the embryonic stage. As the spider enters ...

enjoyed a period of fruitful cross-fertilization with Chinese Buddhism, especially the Ch'an (Zen) school. Livia Kohn and Yoshinobu Sakade ...

of particular schools and the cross-fertilization of stylistic influences from other countries such as China, Nepal and India. Tibetan visual ...

Dogs bear their litters roughly 9 weeks after fertilization, although the length of gestation can vary from 56 to 72 days. A general rule of ...

Others still highlight the late-1970s cross-fertilization of heavy metal with fast-paced, youthful punk rock (e.g., Sex Pistols), culminating in the ...

year and cattle began to be used for plowing and fertilization. By the Tang Dynasty (618-907), China had become a unified feudal agricultural society ...

Nos. 1 to 4. Within this group, the cross-fertilization from the world of Mahlerian song is in fact considerable. The Symphony No. 1 uses a melodic ...

practice, however, there is considerable cross-fertilization that takes place among the various fields. Psychology differs from biology and neuroscience ...

source of natural irrigation and fertilization, the floods can kill thousands and displace millions. Excess, erratic, or untimely monsoon rainfall ...

control insect pollination and ensure cross-fertilization. As with the barnacles, homologous parts served different functions in different species. Back ...

are used by snakes; all snakes employ internal fertilization, accomplished by means of paired, forked hemipenes, which are stored inverted in the male ...