reproductive

Zygote

... diploid cell formed by union of two gametes or reproductive cells . Ovum (female gamete ) fertilized by a ...ll article >>> Definition: Haploid reproductive cells that unite during sexual reproduction to form a diploid zygote . Male gametes are sp...

Viscera

...cluding the digestive tract, paired kidney s, and reproductive organ s. a mantle that surrounds but does not cover entirely the viscera l mass and secretes a shell (if one is present). Full article >>> AKA: viscera l arches columns of mesen chyme found in the neck of the developing verteb...

Viability

...t has two components: survival ( viability ) and reproductive success ( fecundity ). Full article >>>...

Vesicle

...62;> seminal vesicle s Apart of the male reproductive tract that stores sperm in invertebrates and produces semen in vertebrates . Full article >>> The transport vesicle s from the ER fuse with the cis face of the Golgi apparatus (to the cisterna e) and empty their protein ...

Vertebrates

..., made up of similar segment s and containing the reproductive organ s and part of the digestive tract. Full article >>> In vertebrates , Sonic hedgehog is involved setting up the dorsal / ventral , the back-to-front pattern of the nervous system . So telling one side from another is really wh...

Vas deferens

...sel + deferre, to carry down] The tube in the male reproductive system in which sperm travel from the epididymis to the urethra . Full article >>> Vas deferens obstruction Infection, e.g. prostatitis Retrograde ejaculation Hypospadias Impotence ... Full article >>> Each v...

Vagina

...rom the uterus to the exterior; or a place where reproductive cells are stored Source: Noland, George B. 1983....s from the uterus to the vestibule of the female reproductive tract. Full article >>> vagina Part of the female reproductive system between the ...

Uterus

...icle >>> uterus [L. womb] A female reproductive organ where eggs are fertilized and/or developme... uterus (womb)The portion of female mammals ' reproductive tract in which the embryo develops. utilitarian conservation A philosophy that resources should ...

Urine

...les; also serves in males as the exit tube for the reproductive system. Full article >>> For example, the (fictitious) transcription factor ZQ1 usually binds to the sequence s AAAGTT, AAGGTT or AAGATT. The consensus sequence for that factor is said to be AARRTT (where R is any p urine , i.e....

Urethra

...les; also serves in males as the exit tube for the reproductive system. Full article >>> urethra A narrow tube that trans ports urine from the bladder to the outside of the body. In males, it also conducts sperm and semen to the outside. PICTURE ... Full article >>> urethra...

Ureter

...les; also serves in males as the exit tube for the reproductive system. Full article >>> renal pelvis: Basically just a funnel, the renal pelvis accepts the urine and channels it out of the hilus into the ureter . ureter : A narrow tube 40 cm long and 4 mm in diameter. Passing from the ...

Unicellular

...ular often environment ally resistant dormant or reproductive body produced by plant s and some microorganisms and capable of development into a new individual either directly or after fusion with another spore . Conjugation ... Full article >>> unicellular ( cytoplasm ic) organ ization Th...

Trait

...t promotes survival — at least until one's reproductive years are over — increases fitness . Such trait s are adaptation s. Sexual Selection ... Full article >>> dominant trait A trait whose phenotype is determined by a single allele at a particular locus . dormant H...

Testes

testes male reproductive organ s that produce sperm s; contrast to ovary...docrine glands that secrete androgens ; the male reproductive organ s located in the scrotum . thalamus : a portion of the forebrain that integrates sensory ...

Tendon

...docrine glands that secrete androgens ; the male reproductive organ s located in the scrotum . thalamus : a portion of the forebrain that integrates sensory impulses. Full article >>> tendon A bunch of parallel collagen fibers making up a bank of connective tissue that serves to attac...

Tendons

...docrine glands that secrete androgens ; the male reproductive organ s located in the scrotum . thalamus : a portion of the forebrain that integrates sensory impulses. Full article >>> Muscle s and tendons The movements of the human hand are accomplished by two sets of each of these tis...

Taxon

... two features in common. One aspect is the idea of reproductive compatability and continuity within a species . Full article >>> Guild. A group of species , possibly unrelated taxon omically, that exploit overlapping resources Gyre. Major cyclonic surface current systems in the oceans Halocline....

Suppression

...s found in nature that kill, weaken, or reduce the reproductive potential of other organ isms. Full article >>> *Parallel Triplex Formation as Possible Approach for Suppression of DNA Viruses Reproduction V.L. Florentiev, A.K. Shchyolkina, I.A. Il'icheva, E.N. Timofeev, and S.Yu Tsybenko En...

Survival

... Species of organ ism that uses a survival and reproductive "strategy" character ized by low fecundity , low mortality, and longer life and with population s approaching the carrying capacity of the environment , ... Full article >>> - an imaginary planet, which maintains conditions for i...

Style

...ticle >>> style Part of the female reproductive structure in the carpel of a þower; formed from the ovary wall. The tip of the style carries the stigma to which pollen grain s attach. Part of the pistil that separates the stigma from the ovary . Full article >>> ...

Strand

...cies population by individuals recruited in one reproductive season ... Full article >>> the lack of a nucleus ; the possession of a single double- strand ed DNA molucule the possession of a very small range of organelles ... Full article >>> fungus (plural: fungi ). A m...

Stigma

...icle >>> stigma Part of the female reproductive structure of the carpel of a þower; the st...article >>> stigma The part of the reproductive organ s of flower s where pollen grain s germinate. Covered in Lab 8 Seed Plant Reproduction ...

Sterile cell

...eed Plant Reproduction stigma The part of the reproductive organ s of flower s where pollen grain s germin...cestrally, ... Full article >>> The reproductive organ of bryophytes, consisting of the male anther idium and female archegonium; a multichambered...

Stamen

... stamen [L. a thread] The pollen-producing male reproductive organ of a flower , consisting of an anther and filament. Full article >>> stamen The floral organ that produces pollen; consisting of an anther and filament. staminate flower A flower having stamen s but no carpel s. ...

Spore

...c life cycle. A spore is a biological term for a reproductive mechanism, usually haploid and unicellular , th...ular often environment ally resistant dormant or reproductive body produced by plant s and some microorganisms and capable of development into a new individual e...

Spermatid

...;>> spermatid A growth stage of a male reproductive cell arising by division of a secondary sperm atocyte; gives rise to a sperm atozoon. sperm atium Minute, nonmotile male gametes that occur in the rust fungi . Full article >>> spermatid s A haploid stage in male gameto...

Spermatogenesis

... atozoa. sperm atogonium Precursor of mature male reproductive cell ; gives rise directly to a sperm atocyte. Full article >>> spermatogenesis the continuous and prolific production of mature sperm cells in the testis via meiosis . sperm atogonium (plural, sperm atagonia) An early diploi...

Sperm cells

...le). Human beings have 23 chromosomes in their reproductive cells . Full article >>> gametes ...t s. Human beings have 23 chromosomes in their reproductive cells . Compare diploid . Full article >>> a single cell produces four daughter ...

Species

...em to exist in a dormant stage. It is an asexual reproductive cell . See Asexual reproduction , Dormant. Full article >>> A species of animal which possesses an amnion . This term is most often used in the plural (amniotes) to refer to reptiles, birds, and mammals collectively. Full art...

Speciation

...2;> speciation in which the evolution of reproductive isolating mechanisms occurs within the range and ... population or group of population s that are in reproductive contact but are reproductively isolated from all other population s ... Full article >>...

Sperm

...contain food. Sex Organ s of the Human Male The reproductive system of the male has two major functions: ... F...t fungi . sperm atocyte A growth stage of a male reproductive cell ; gives rise to a sperm atid . Full article >>> sperm atids A haploid st...

Somatic cell

...l nuclear trans fer can create clones for both reproductive and therapeutic purposes. The diagram depicts the ...of the cells of a plant or animal except the reproductive cells . somite A serial segment of the animal body. Covered in Lab 12 Animal Diversity II ....

Somatic

...of the cells of a plant or animal except the reproductive cells . somite A serial segment of the animal body. Covered in Lab 12 Animal Diversity II ... Full article >>> Somatic hypermutation : A very high frequency of mutation al events that occur in specific loci , such as the ...

Siphon

..... Full article >>> siphon ogamy A reproductive process in seed plant s in which a pollen tube carries the sperm cells to the egg located within the integument ed megasporangium . siphon oglyph Ciliated furrow in the gullet of sea anemones. Full article >>> siphon Found ...

Similarity

...etophyte generation carrying both male and female reproductive organ s. Full article >>> This level of similarity is something that we use to infer that the genes are homologous, that is they have a common ancestry. Those genes came from the same origin al gene some time over evolution ary ...

Sexual

...on . Related Terms: Gamete Mature male or female reproductive cell ( sperm or ovum ) with a haploid set of chromosomes (23 for human s). Full article >>> (See RNA .) A sexual reproduction . Non sexual means of reproduction which can include grafting and budding . Autosome . A ch...

Sexual reproduction

...on . Related Terms: Gamete Mature male or female reproductive cell ( sperm or ovum ) with a haploid set of...ll article >>> Definition: Haploid reproductive cells that unite during sexual reproduction to form a diploid zygote . Male gametes are sp...

Sepals

...eaves that protect a flower 's inner petal s and reproductive structures. Small, leaf -like structures in flower s that enclose and protect the developing flower . Full article >>> a whorl of sepals (collectively called the calyx ) a whorl of petal s (collectively called the corolla ) ...

Sepal

...eaves that protect a flower 's inner petal s and reproductive structures. Small, leaf -like structures in flower s that enclose and protect the developing flower . Full article >>> SEPAL LATA3 (SEP3) is one of four SEP genes in Arabidopsis . If all but SEP4 are inactivated, a flower with o...

Seminal vesicles

...>> seminal vesicles Apart of the male reproductive tract that stores sperm in invertebrates and p...#62; semen The thick, whitish secretion of the reproductive organ s in the male; composed of sperm and secretions from the prostate, seminal vesicles , and ...

Semen

...rm and secretions from several glands of the male reproductive tract. Full article >>> semen The thick, whitish secretion of the reproductive organ s in the male; composed of sperm and secretions from the prostate, seminal vesicles , and ...

Self-incompatibility

...f a flower that cannot successfully complete the reproductive process with pollen produced by its own stamen s. self-pollination Trans fer of pollen from stamen to stigma within the same plant . Full article >>> exigua is an obligate outcrosser exhibiting sporophytic self-incompatibilit...

Seed plant

... Full article >>> a character istic reproductive structure of seed plant s that consists of an embryo , enclosed by a seed coat , and a food-storage tissue ; see endosperm Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... Full article >>&...

Seed

seed a character istic reproductive structure of seed plant s that consists of an embryo , enclosed by a seed coat , and a food-storage tissue ; see endosperm Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... Full article >&#...

Repressor

...o and controls the regulator in gene regulation. reproductive barrier The factors that prevent one sexual ly propagating population from interbreeding and exchanging genes with another population . Full article >>> repressor protein - DNA regulatory protein that binds the operator (...

Reproduction

...ll article >>> Definition: Haploid reproductive cells that unite during sexual reproduction to form a diploid zygote . Male gametes are sperm and female gametes are eggs. Full article >>> annual. A plant that normally completes its life cycle of seed germination, ...

Receptacle

... The buds on alfalfa crowns that become new stems. reproductive bud. The buds on alfalfa stems that become flower...in, ... Full article >>> The female reproductive system likewise contains two main division s: the vagina and uterus , which act as the receptac...

Prostaglandins

...cts on smooth muscle s, on various glands, and in reproductive physiology . Full article >>> pro...cts on smooth muscle , nerves , circulation, and reproductive organ s. Full article >>> Prostaglandins Leukot Essent Fatty Acids 69:87-97. Eg...

Prophage

... in the host is detected, the phage enters its reproductive cycle. Full article >>> Prophage A temperate phage genome whose lytic functions are repressed and which replicates in synchrony with the bacteria l chromosome . Full article >>> prophage A phage genome tha...

Proglottid

... article >>> proglottid One set of reproductive organ s in a tapeworm strobila; usually correspon...rm. Full article >>> proglottid A reproductive division of a tapeworm. Covered in Lab 11 Animal Diversity I prostate gland a gland of male ...

Progesterone

...;>> progesterone One of the two female reproductive hormones secreted by the ovaries. Full article ...uteum secretes progesterone , which prepares the reproductive organ s for pregnanacy and maintains the uterine lining. If the egg is fertilized the corpus lut...

Probability

... Class ic genetic fitness is the average direct reproductive success of an individual possessing a specific genotype in comparison to others in the population . Inclusive fitness is described as the class ic fitness plus the probability that an ... Full article >>> The frequency at whi...

Population genetics

...ulation that results in individuals with improved reproductive success. Full article >>> The merger of class ical Darwinian evolution with population genetics . A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>>...

Pollen tube

... . Full article >>> siphon ogamy A reproductive process in seed plant s in which a pollen tube carries the sperm cells to the egg located within the integument ed megasporangium . siphon oglyph Ciliated furrow in the gullet of sea anemones. Full article >>> In angiosperm ...

Pleiotropy

...us later in life (no change in fitness after the reproductive age). Full article >>> GAs do not ignore polygeny and pleiotropy : these properties are merely allowed to arise naturally rather than being deliberately coded in. Full article >>> Antagonistic pleiotropy . Genes that p...

Plant

...t s. Human beings have 23 chromosomes in their reproductive cells . Compare diploid . Full article >>>...

Pistil

...>>> pistil The flask-shaped female reproductive unit of a flower , composed of ovary , style , and stigma . Covered in Lab 8 Seed Plant Reproduction ... Full article >>> After the pistil is pollinated, the pollen grain germinates in a response to a sugary fluid secreted ...

Pinna

... they (usually) produce cones of nonphotosynthetic reproductive structures. Full article >>> About 30,000 federal and state judges, representing the pinna cle of the government's authority, want to dispense justice through fair trials. The definitive power is the ability of the state to take the l...

Physiology

...cts on smooth muscle s, on various glands, and in reproductive physiology . Full article >>> The scientific tradition that stresses the relationship between a physical structure and its function, for example, the related disciplines of anatomy and physiology . Subcloning . Full article >...

Parthenogenesis

...icle >>> parthenogenesis - special reproductive strategy in which unfertilized eggs undergo cell division and embryo genesis to develop into viable adult individuals ("virgin birth"). Full article >>> Parthenogenesis the ability of an unfertilized egg to develop and hatch (p...