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Reproduction in Biological Dictionary

Sexual reproduction

... Sexual reproduction is characterized by processes that pass a ... hypotheses to explain the evolution of sexual reproduction . Many groups of organisms, notably the majority ... reproduce sexually. The evolution of ... reproduction , process whereby all living organisms produce ...

Reproduction

... reproduction is the biological process by which new individual organisms are produced. reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction . The known ... Web site for ...

Parthenogenesis

... Parthenogenesis is an asexual form of reproduction found in females where growth and development of ... from ... parthenogenesis n. A form of reproduction in which an unfertilized egg develops into a ... ... Parthenogenesis , a form of asexual reproduction in which a new organism develops ... ...

Darwinian fitness

... at Britannica. Assorted References effect on reproduction ( in reproduction (biology): Natural selection and reproduction ) ... this way the more successful variants ...

Budding

... ... See also: Shield budding ... budding reproduction of some unicellular organisms (such as yeasts) ... and encyclopedia. budding ... budding - reproduction of some unicellular ... budding ... MU ... of ... Budding is a form of asexual reproduction carried out by individuals who are ... Offspring ...

Binary fission

... or prokaryotic fission , is the form of asexual reproduction and cell division used by all prokaryotic ... organisms. This process results in the reproduction of a living prokaryotic cell by division ... binary fission n. A method of asexual reproduction that involves the splitting of a parent cell ...

Asexual

... and societal views on asexuality. Asexual reproduction is reproduction which does not involve meiosis, ploidy ... community as well as a ... asexual reproduction ( ā′sekshəwəl ′rēprə′dəkshən ) ( biology ) ...

Asexual reproduction

... Asexual reproduction is reproduction which does not involve meiosis, ploidy ... Only one parent is involved in asexual reproduction . A more stringent definition is agamogenesis ...

Apomixis

... apomixis is replacement of the normal sexual reproduction by asexual reproduction, without ... apomixis , but replacement ... apomixis n. reproduction without meiosis or formation of gametes. ... ... ... The potential benefits of clonal plant reproduction by apomixis are numerous. ... Apomixis and ...

Syngamy

... nouns | Biology ... MEIOSIS and SYNGAMY . The basis of sexual reproduction is meiosis and syngamy . ... Meiosis and Syngamy | Gametes | Evolution of Life Cycles ... Sexual reproduction involves meiosis and syngamy . ... syngamy -- The process of union ...

Sex cells

... the daughter cells are not only identical to each other, but they ... reproduction is a basic drive in all animals, including humans. Think you know what human reproduction is all about? Discover the biology of sex . Encyclopedia article ...

Micropyle

... are discussed in the following places at Britannica. Assorted References reproduction in plants ( in angiosperm (plant): Ovules; ... initiation of the ... are discussed in the following places at Britannica. Assorted References reproduction in insects ( in insect (arthropod class): Reproductive system; The ...

Lytic cycle

...l... Lysogeny, or the lysogenic cycle , is one of two methods of viral reproduction . Lysogeny in prokaryotes is characterized by integration of the ... Lysogeny , or the lysogenic cycle , is one of two methods of viral reproduction (the lytic Viruses can multiply by two alternate mechanisms: the ...

Autogamy

... . hercogamous. self-fertilization. paedogamy (invertebrate zoology) reproduction (animal) ... Encyclopedia article about autogamy . Information about ... ... ... plant biology > plant physiology > plant reproduction > apomixis > autogamy ... Resources in autogamy : No resources ...

Tracheophytes

... , collective term applied to vascular plants of nine divisions, or ... " Tracheophytes ," Microsoft® Encarta® Online Encyclopedia 2009 ... reproduction : plants: tracheophytes . The other phyla are collectively termed vascular plants, or tracheophytes . ... tracheophytes ... TRACHEOPHYTES , ...

Tracheae

... were divided arbitrarily into seven classes according to ... Tracheae entering the prosoma have only 4–10 % of the total tracheal diffusing ... reproduction occurs within the tracheae of adult bees, where female mites may lay 8–20 eggs. ... The tracheae are separated out, cleared with 8% potassium ... ...

Synergid

... small cells lying near the micropyle of the embryo sac of an ... The synergid cells within the female gametophyte are essential for reproduction in angiosperms. ... the micropylar pole, the synergid cell wall is extensively ... tube and synergid ) forms the milieu in which the ...

Sporangiophore

... Edition [home, ... sporangiophore ( ) n. A specialized branch bearing one or more sporangia. ... How does a sporangiophore function in the reproduction of fungi? ... Pilobolus A fungus which grows prolifically on cow feces and facilitates the spread of lungworm larvae by ... structure (the ...

Sperm cells

... The term sperm is derived from the Greek word (σπέρμα) sperma and refers to the male reproductive cells . In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of ... A sperm , from the ancient Greek word σπέρμα (seed) and ζῷον ...

Sperm

... The term sperm is derived from the Greek word (σπέρμα) sperma and refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of ... The sperm whale, Physeter macrocephalus, is a species of ...

Sex chromosomes

... are gender specific. ... ... hours in front of a computer screen makes him unable to pass on his Y chromosome ... Chromosomes . Sex and reproduction ... ... particular chromosomes that are involved in determining the sex of an organism. ... only one of the two sex chromosomes as a ...

Seed plant

... largely by the activities of seed plants . ... Conifers are seed plants ; they include pines, firs, yew, redwood, and many other ... ... reproduction highlights; and the Angiosperms—covered seed plants , ... seed plants ... as food for the plant embryo or may become part of the seed . ....

Secondary metabolite

... Secondary metabolites are organic compounds that are not directly involved in the normal growth, development, or reproduction of organisms. Unlike primary metabolites, absence of secondary metabolities does not result in immediate death, but rather in ... ...

Recombination

... genetic recombination ... recombination , process of "shuffling" of genes gene, the structural unit of ... In recombination through sexual reproduction ... Recombination is a means by which a sexually reproducing organism passes on to ... This process is called recombination or crossing ...

Random mating

... ... Chapter 6. Mendelian Genetics in Populations II: Migration, Genetic Drift and Non- Random Mating ... If mating is random , F=0. If all reproduction is by self ... size of a random - mating population of dioecious organ ... behind the random - mating model is. are ... Random ...

Preformation

... " was a early theory of development, which flourished for over a century. ... He did not put forward a theory of " preformation " ... reproduction has always been a controversial topic, and the scientific debates over it in early modern Europe were no ... ...

Pollination

... pollination ... Top of Page Pollinator Paradise Pollination Ecology at UI The Solitary Bee Web ... Pollination , an important step in the reproduction of seed plants, is the ... Most gymnosperms rely on wind- pollination . ... Pollination reflects an underlying ... The study of ...

Plant physiology

... ; Intro Study Guide ... AP Biology > Plant Physiology ... login | my website | Plant Organs and Systems ... Flowering Plant Sexual reproduction Download. Plant Growth and Regulation Download ... Plant physiology and metabolism lab. ...

Pectoral girdle

... girdle , to which the upper limbs attach, consists of a clavicle and ... Copyright © The McGraw-Hill Companies, inc. Permission required for reproduction ... ... dictionary with pronunciation, synonyms, and translation of Pectoral girdle . ... Link To pectoral girdle . Kymaro New Body ...

Paramecium

... : large ciliate protozoan that lives in stagnant freshwater. ... Food vacuole: cavity of the paramecium responsible for digestion. ... reproduction in paramecium involves the exchanging of DNA within the micronucleus. In order to do this, two paramecium lie side by side and join at the ...

Oscillatoria

... rhythmic oscillating motion, which is thought to result from a secretion of mucilage that pushes the filament away from the direction of excretion. reproduction is ... Violuric acid can be used to inhibit and/or prevent the growth of many ... Ankistrodesmus, Anabaena, Synura, Oscillatoria , ...

Oogenesis

... in the free online English dictionary and ... Oogenesis in humans begins in embryonic and fetal development, when diploid germ ... posted to reproduction ovogenesis oogenesis oocyte invertebrate gigas by altotor ... posted to vertebrate spermatogenesis oogenesis molecular cyclin cell-cycle by ......

Microsporangium

... ... Aspects of the topic microsporangium are discussed in the following places at Britannica. Assorted References function in plant reproduction ( in plant (life form): Heterosporous life histories; ... mitotically to form the embryo, which then develops into the sporophyte. ...

Mating type

... Mating types occur in eukaryotes that undergo sexual reproduction via isogamy. ... Each mating type can signal its presence to others, (the "female" signals the " ... The yeast ...

Macrorestriction map

... map of the Candia albicans genome. ... ... Macroprocessing - Macrorestriction map - Macsaber - MacSamson - Macster ... Mapped Drive - Map reproduction - MAP /TOP - MAPD - MAPI method - Mapimi Basin ... A macro-restriction map was constructed by linking probe hybridisation of SwaI ... ...

Interstitial cells

... CELLS OF CALIFORNIA QUAIL ... THAT the interstitial (Leydig) cells of the testis are the major source of ... Home > Dogs Home Page > reproduction > Article: Interstitial Cell Tumor ... An interstitial cell tumor is a benign tumor of the testicle. ... Cells are the smallest ...

Horizontal gene transfer

... is well-known among bacteria, it is only within ... Horizontal transfer - an introduction. Gene transfer between organisms without reproduction ... Bacterial gene transfer by natural genetic transformation in ... The online version of Horizontal Gene Transfer on ScienceDirect, ...

Hormone

... a chemical messenger that transports a signal ... Growth hormone (GH) is a Protein Poly-peptide hormone . It stimulates growth and cell reproduction and regeneration in humans and other animals. It is a 191-amino acid, single-chain Protein polypeptide hormone that ... Thyroid hormone ...

Hermaphrodite

... having both male and female reproductive organs. In many species, hermaphroditism is a common part of the life-cycle, enabling a form of sexual reproduction in which partners are not ... Hermaphrodite born with a penis and vagina. ... Make your hermaphrodite Fantasy A Reality. Thank you ...

Gymnosperms

... ancestors of ... Review of the essentials of both groups of seed plants: the Gymnosperms —naked seed plants and their form, function and reproduction highlights; and the Angiosperms ... Gymnosperms are a type of plant that reproduce by a seed that is not enclosed as ... Gymnosperms are ...
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