Definition for User contributions

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• 11:42, 26 January 2011 (diff | hist) . . (+165)‎ . . N Viral envelope ‎ (Created page with "A structure enclosing the capsid that consists of a membrane derived from the plasma membrane of the host cell and embedded with virally encoded spike glycoproteins.") (current)
• 11:42, 26 January 2011 (diff | hist) . . (+32)‎ . . N Viral genome ‎ (Created page with "The genetic material in a virus.") (current)
• 11:42, 26 January 2011 (diff | hist) . . (+95)‎ . . N Viral reproductive cycle ‎ (Created page with "The series of steps that results in the production of new viruses after a virus infects a cell.") (current)
• 11:41, 26 January 2011 (diff | hist) . . (+78)‎ . . N Viral vector ‎ (Created page with "A type of vector that is derived from a virus and used in cloning experiments.") (current)
• 11:40, 26 January 2011 (diff | hist) . . (+41)‎ . . N Viroid ‎ (Created page with "An RNA particle that infects plant cells.") (current)
• 11:40, 26 January 2011 (diff | hist) . . (+24)‎ . . N Virulence ‎ (Created page with "The infection of tissue.") (current)
• 11:38, 26 January 2011 (diff | hist) . . (+42)‎ . . N Virulent phage ‎ (Created page with "A phage that follows only the lytic cycle.") (current)
• 00:50, 26 January 2011 (diff | hist) . . (+85)‎ . . N Virus ‎ (Created page with "A small infectious particle that consists of nucleic acid enclosed in a protein coat.") (current)
• 00:50, 26 January 2011 (diff | hist) . . (+83)‎ . . N Visceral mass ‎ (Created page with "In molluscs, a structure that rests atop the foot and contains the internal organs.")
• 00:50, 26 January 2011 (diff | hist) . . (+97)‎ . . N Vitamin ‎ (Created page with "An important organic nutrient that serves as a coenzyme for metabolic and biosynthetic reactions.") (current)
• 00:50, 26 January 2011 (diff | hist) . . (+112)‎ . . N Vitamin D ‎ (Created page with "A molecule that regulates calcium levels in the blood through an action on intestinal transport of calcium ions.")
• 00:49, 26 January 2011 (diff | hist) . . (+110)‎ . . N Vitreous humour ‎ (Created page with "A thick liquid in the large posterior cavity of the vertebrate eye, which helps maintain the shape of the eye.") (current)
• 00:49, 26 January 2011 (diff | hist) . . (+59)‎ . . N Viviparity ‎ (Created page with "The process in which the embryo develops within the mother.") (current)
• 00:48, 26 January 2011 (diff | hist) . . (+129)‎ . . N Viviparous ‎ (Created page with "The term used to describe an organism whose eggs develop within the uterus, receiving nourishment from the mother via a placenta.") (current)
• 00:48, 26 January 2011 (diff | hist) . . (+128)‎ . . N Volt ‎ (Created page with "A unit of measurement of the difference in charge (the electrical force), such as between the interior and exterior of the cell.") (current)
• 00:48, 26 January 2011 (diff | hist) . . (+108)‎ . . N Voltage-gated channel ‎ (Created page with "A channel that opens and closes in response to changes in the amount of electric charge across the membrane.") (current)
• 00:48, 26 January 2011 (diff | hist) . . (+127)‎ . . N V-snare ‎ (Created page with "A protein incorporated into the vesicle membrane during vesicle formation that is recognized by a t-snare in a target membrane.") (current)
• 00:47, 26 January 2011 (diff | hist) . . (+30)‎ . . N Water potential ‎ (Created page with "The potential energy of water.")
• 00:47, 26 January 2011 (diff | hist) . . (+212)‎ . . N Water vascular system ‎ (Created page with "A network of canals powered by hydraulic power, that is, by water pressure generated by the contraction of muscles that enables the extension and contraction of the tube feet, al...") (current)
• 00:46, 26 January 2011 (diff | hist) . . (+66)‎ . . N Wavelength ‎ (Created page with "The distance from the peak of one sound or light wave to the next.") (current)
• 00:46, 26 January 2011 (diff | hist) . . (+106)‎ . . N Waxy cuticle ‎ (Created page with "A protective waterproof layer of wax and polyester present on most surfaces of vascular plant sporophytes.") (current)
• 00:46, 26 January 2011 (diff | hist) . . (+48)‎ . . N Weak acid ‎ (Created page with "An acid that only partially ionizes in solution.") (current)
• 00:46, 26 January 2011 (diff | hist) . . (+44)‎ . . N Weathering ‎ (Created page with "The physical and chemical breakdown of rock.") (current)
• 00:45, 26 January 2011 (diff | hist) . . (+207)‎ . . N White blood cell ‎ (Created page with "A cell that develops from the inner parts (the marrow) of certain bones in vertebrates; all white blood cells (known as leukocytes) perform vital functions that defend the body a...")
• 00:45, 26 January 2011 (diff | hist) . . (+105)‎ . . N White matter ‎ (Created page with "Brain tissue that consists of myelinated axons that are bundled together in large numbers to form tracts.") (current)
• 00:45, 26 January 2011 (diff | hist) . . (+75)‎ . . N Whorls ‎ (Created page with "In a flower, four concentric rings of sepals, petals, stamens, and carpels.") (current)
• 00:45, 26 January 2011 (diff | hist) . . (+46)‎ . . N Wild-type allele ‎ (Created page with "One or more prevalent alleles in a population.") (current)
• 00:45, 26 January 2011 (diff | hist) . . (+193)‎ . . N Wood ‎ (Created page with "A secondary plant tissue composed of numerous pipelike arrays of dead, empty, water-conducting cells whose walls are strengthened by an exceptionally tough secondary metabolite k...") (current)
• 00:44, 26 January 2011 (diff | hist) . . (+66)‎ . . N Woody plant ‎ (Created page with "A plant that produces both primary and secondary vascular tissues.") (current)
• 00:44, 26 January 2011 (diff | hist) . . (+137)‎ . . N X inactivation ‎ (Created page with "The phenomenon in which one X chromosome in the somatic cells of female mammals is inactivated, meaning that its genes are not expressed.")
• 00:44, 26 January 2011 (diff | hist) . . (+205)‎ . . N Xenoestrogen ‎ (Created page with "A synthetic compound that exerts estrogen-like actions or, in some cases, inhibits the actions of the body's own estrogen; the consequences are dramatic on fertility and developm...") (current)
• 00:44, 26 January 2011 (diff | hist) . . (+83)‎ . . N X-inactivation centre (Xic) ‎ (Created page with "A short region on the X chromosome known to play a critical role in X inactivation.") (current)
• 00:44, 26 January 2011 (diff | hist) . . (+50)‎ . . N X-linked gene ‎ (Created page with "A gene found on the X chromosome but not on the Y.")
• 00:43, 26 January 2011 (diff | hist) . . (+90)‎ . . N X-linked inheritance ‎ (Created page with "The pattern displayed by pairs of dominant and recessive alleles located on X chromosomes.") (current)
• 00:43, 26 January 2011 (diff | hist) . . (+411)‎ . . N X-ray crystallography ‎ (Created page with "A technique in which researchers purify a molecule, such as a protein or protein complex, and expose it to conditions that cause the protein's molecules to associate with each ot...") (current)
• 00:43, 26 January 2011 (diff | hist) . . (+77)‎ . . N Xylem ‎ (Created page with "A plant vascular tissue that conducts water, minerals, and organic compounds.") (current)
• 00:43, 26 January 2011 (diff | hist) . . (+171)‎ . . N Xylem loading ‎ (Created page with "The process by which root xylem parenchyma cells transport ions and water across their membranes into the xylem apoplast, which includes the vessel elements and tracheids.") (current)
• 00:42, 26 January 2011 (diff | hist) . . (+72)‎ . . N Yeast ‎ (Created page with "A fungus that can occur as a single cell and that reproduces by budding.") (current)
• 00:42, 26 January 2011 (diff | hist) . . (+134)‎ . . N Yolk sac ‎ (Created page with "An extraembryonic membrane in the amniotic egg that encloses a stockpile of nutrients, in the form of yolk, for the developing embryo.") (current)
• 00:42, 26 January 2011 (diff | hist) . . (+64)‎ . . N Z line ‎ (Created page with "A network of proteins that anchor thin filaments in a sarcomere.") (current)
• 00:42, 26 January 2011 (diff | hist) . . (+235)‎ . . N Z scheme ‎ (Created page with "According to this scheme, an electron absorbs light energy twice, and it loses some of that energy as it flows along the electron transport chain in the thylakoid membrane. The e...") (current)
• 00:42, 26 January 2011 (diff | hist) . . (+59)‎ . . N Zero population growth ‎ (Created page with "The situation in which no changes in population size occur.") (current)
• 00:41, 26 January 2011 (diff | hist) . . (+40)‎ . . N Zoecium ‎ (Created page with "A nonliving case that houses a bryozoan.") (current)
• 00:41, 26 January 2011 (diff | hist) . . (+131)‎ . . N Zone of elongation ‎ (Created page with "The area above the root apical meristem of a plant where cells extend by water uptake, thereby dramatically increasing root length.") (current)
• 00:41, 26 January 2011 (diff | hist) . . (+113)‎ . . N Zone of maturation ‎ (Created page with "The area above the zone of elongation in a plant where root cell differentiation and tissue specialization occur.") (current)
• 00:40, 26 January 2011 (diff | hist) . . (+174)‎ . . N Zooplankton ‎ (Created page with "Aquatic organisms including minute animals consisting of some worms, copepods, tiny jellyfish, and the small larvae of invertebrates and fish that graze on the phytoplankton.")
• 00:40, 26 January 2011 (diff | hist) . . (+98)‎ . . N Zygomycete ‎ (Created page with "A type of fungus that produces distinctive, large zygospores as the result of sexual reproduction.") (current)
• 00:39, 26 January 2011 (diff | hist) . . (+96)‎ . . N Zygospore ‎ (Created page with "A dark-pigmented, thick-walled spore that matures within the zygosporangium of zygomycete fungi.") (current)
• 00:39, 26 January 2011 (diff | hist) . . (+133)‎ . . N Zygote ‎ (Created page with "A diploid cell, formed by the fusion of two gametes, that divides, develops into an embryo, and eventually becomes an adult organism.") (current)
• 00:38, 26 January 2011 (diff | hist) . . (+65)‎ . . N Zygotic life cycle ‎ (Created page with "In this type of life cycle, haploid cells transform into gametes.") (current)

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