Definition for User contributions

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• 23:02, 26 January 2011 (diff | hist) . . (+95)‎ . . N Stem cell ‎ (Created page with "A cell that divides and supplies the cells that construct the bodies of all animals and plants.")
• 23:02, 26 January 2011 (diff | hist) . . (+64)‎ . . N Stereocilia ‎ (Created page with "Deformable projections that resemble hairs on a mechanoreceptor.")
• 23:01, 26 January 2011 (diff | hist) . . (+114)‎ . . N Stereoisomers ‎ (Created page with "Isomers with identical bonding relationships, but the spatial positioning of the atoms differs in the two isomers.") (current)
• 23:01, 26 January 2011 (diff | hist) . . (+1)‎ . . Sternum ‎ (current)
• 23:01, 26 January 2011 (diff | hist) . . (+14)‎ . . N Sternum ‎ (Created page with "The breastbone")
• 23:00, 26 January 2011 (diff | hist) . . (+105)‎ . . N Steroid ‎ (Created page with "A lipid containing four interconnected rings of carbon atoms; function as hormones in animals and plants.") (current)
• 22:59, 26 January 2011 (diff | hist) . . (+110)‎ . . N Steroid receptor ‎ (Created page with "A transcription factor that recognizes a steroid hormone and usually functions as a transcriptional activator.") (current)
• 22:59, 26 January 2011 (diff | hist) . . (+117)‎ . . N Sticky ends ‎ (Created page with "Single-stranded ends of DNA fragments that will hydrogen-bond to each other because of their complementary sequences.") (current)
• 22:59, 26 January 2011 (diff | hist) . . (+161)‎ . . N Stigma ‎ (Created page with "1. A topmost portion of the pistil, which receives and recognizes pollen of the appropriate species or genotype. 2. In many protists, a red cellular structure.") (current)
• 22:59, 26 January 2011 (diff | hist) . . (+201)‎ . . N Stomach ‎ (Created page with "A saclike organ that most likely evolved as a means of storing food; it partially digests some of the macromolecules in food and regulates the rate at which the contents empty in...")
• 22:58, 26 January 2011 (diff | hist) . . (+169)‎ . . N Stomata ‎ (Created page with "Surface pores on plant surfaces that can be closed to retain water or opened to allow the entry of CO2 needed for photosynthesis and the exit of oxygen and water vapour.")
• 22:58, 26 January 2011 (diff | hist) . . (+92)‎ . . N Termination codon ‎ (Created page with "One of three three-base sequences—UAA, UAG, and UGA—that signals the end of translation.") (current)
• 22:58, 26 January 2011 (diff | hist) . . (+92)‎ . . N Stop codon ‎ (Created page with "One of three three-base sequences—UAA, UAG, and UGA—that signals the end of translation.")
• 22:58, 26 January 2011 (diff | hist) . . (+93)‎ . . N Strain ‎ (Created page with "Within a given species, a lineage that has genetic differences compared with another lineage.")
• 22:57, 26 January 2011 (diff | hist) . . (+93)‎ . . N Strand ‎ (Created page with "A structure of DNA (or RNA) formed by the covalent linkage of nucleotides in a linear manner.") (current)
• 22:57, 26 January 2011 (diff | hist) . . (+90)‎ . . N Stretch receptor ‎ (Created page with "A type of mechanoreceptor found widely in organs and muscle tissues that can be distended.") (current)
• 22:57, 26 January 2011 (diff | hist) . . (+106)‎ . . N Striated muscle ‎ (Created page with "Skeletal and cardiac muscle with a series of light and dark bands perpendicular to the muscle's long axis.") (current)
• 22:57, 26 January 2011 (diff | hist) . . (+76)‎ . . N Stroke ‎ (Created page with "The condition that occurs when blood flow to part of the brain is disrupted.")
• 22:56, 26 January 2011 (diff | hist) . . (+68)‎ . . N Stroke volume (SV) ‎ (Created page with "The amount of blood ejected with each beat, or stroke, of the heart.") (current)
• 22:56, 26 January 2011 (diff | hist) . . (+97)‎ . . N Stroma ‎ (Created page with "The fluid-filled region of the chloroplast between the thylakoid membrane and the inner membrane.") (current)
• 22:56, 26 January 2011 (diff | hist) . . (+90)‎ . . N Stromatolite ‎ (Created page with "A layered calcium carbonate structure produced by cyanobacteria in an aquatic environment.") (current)
• 22:56, 26 January 2011 (diff | hist) . . (+44)‎ . . N Strong acid ‎ (Created page with "An acid that completely ionizes in solution.") (current)
• 22:56, 26 January 2011 (diff | hist) . . (+135)‎ . . Structural gene ‎
• 22:55, 26 January 2011 (diff | hist) . . (+11)‎ . . N Structural gene ‎ (Created page with "strong acid")
• 22:55, 26 January 2011 (diff | hist) . . (+59)‎ . . N Structural genomics ‎ (Created page with "Genomic methods aimed at the direct analysis of DNA itself.") (current)
• 22:54, 26 January 2011 (diff | hist) . . (+75)‎ . . N Structural isomers ‎ (Created page with "Isomers that contain the same atoms but in different bonding relationships.") (current)
• 22:54, 26 January 2011 (diff | hist) . . (+78)‎ . . N Style ‎ (Created page with "The elongate pistil structure through which the pollen tube of a flower grows.") (current)
• 22:54, 26 January 2011 (diff | hist) . . (+67)‎ . . N Stylet ‎ (Created page with "A sharp, piercing organ in the mouth of nematodes and some insects.") (current)
• 22:54, 26 January 2011 (diff | hist) . . (+61)‎ . . N Submetacentric ‎ (Created page with "Describes a chromosome in which the centromere is off centre.") (current)
• 22:53, 26 January 2011 (diff | hist) . . (+173)‎ . . N Subsidence zones ‎ (Created page with "Areas of high pressure that are the sites of the world's tropical deserts, because the subsiding air is relatively dry, having released all of its moisture over the equator.") (current)
• 22:53, 26 January 2011 (diff | hist) . . (+129)‎ . . N Substrate-level phosphorylation ‎ (Created page with "A method of synthesizing ATP that occurs when an enzyme directly transfers a phosphate from one molecule to a different molecule.")
• 22:53, 26 January 2011 (diff | hist) . . (+113)‎ . . N Substrates ‎ (Created page with "The reactant molecules and ions that bind to an enzyme at the active site and participate in a chemical reaction.") (current)
• 22:53, 26 January 2011 (diff | hist) . . (+91)‎ . . N Succession ‎ (Created page with "The gradual and continuous change in species composition and community structure over time.")
• 22:53, 26 January 2011 (diff | hist) . . (+95)‎ . . N Sugar sink ‎ (Created page with "The plant tissues or organs in which more sugar is consumed than is produced by photosynthesis.") (current)
• 22:52, 26 January 2011 (diff | hist) . . (+85)‎ . . N Sugar source ‎ (Created page with "The plant tissues or organs that produce more sugar than they consume in respiration.") (current)
• 22:52, 26 January 2011 (diff | hist) . . (+136)‎ . . N Sum rule ‎ (Created page with "The probability that one of two or more mutually exclusive outcomes will occur is the sum of the probabilities of the possible outcomes.") (current)
• 22:52, 26 January 2011 (diff | hist) . . (+114)‎ . . N Supercoiling ‎ (Created page with "A method of compacting chromosomes; the phenomenon of forming additional coils around the long, thin DNA molecule.") (current)
• 22:51, 26 January 2011 (diff | hist) . . (+63)‎ . . N Supergroup ‎ (Created page with "A proposed way to organize eukaryotes into monophyletic groups.")
• 22:51, 26 January 2011 (diff | hist) . . (+96)‎ . . N Surface area/volume (SA/V) ratio ‎ (Created page with "The ratio between a structure's surface area and the volume in which the structure is contained.") (current)
• 22:50, 26 January 2011 (diff | hist) . . (+125)‎ . . N Surfactant ‎ (Created page with "A mixture of proteins and amphipathic lipids produced in certain alveolar cells that acts to reduce surface tension in lungs.")
• 22:50, 26 January 2011 (diff | hist) . . (+69)‎ . . N Survivorship curve ‎ (Created page with "A graphical plot of the numbers of surviving individuals at each age.") (current)
• 22:50, 26 January 2011 (diff | hist) . . (+92)‎ . . N Suspension feeder ‎ (Created page with "An aquatic animal that sifts water, filtering out the organic matter and expelling the rest.") (current)
• 22:50, 26 January 2011 (diff | hist) . . (+103)‎ . . N Suspensor ‎ (Created page with "A short chain of cells at the base of an early angiosperm embryo that provides anchorage and nutrients.") (current)
• 22:49, 26 January 2011 (diff | hist) . . (+124)‎ . . N Swim bladder ‎ (Created page with "A gas-filled, balloon-like structure that helps a fish to remain buoyant in the water even when it is completely stationary.") (current)
• 22:49, 26 January 2011 (diff | hist) . . (+62)‎ . . N Swimmeret ‎ (Created page with "An abdominal appendage in a crustacean that provides movement.") (current)
• 22:49, 26 January 2011 (diff | hist) . . (+54)‎ . . N Symbiosis ‎ (Created page with "An intimate association between two or more organisms.")
• 22:49, 26 January 2011 (diff | hist) . . (+103)‎ . . N Symbiotic ‎ (Created page with "Describes a relationship in which two or more different species live in direct contact with each other.") (current)
• 22:48, 26 January 2011 (diff | hist) . . (+162)‎ . . N Sympathetic division ‎ (Created page with "The division of the autonomic system that is responsible for rapidly activating systems that provide immediate energy to the body in response to danger or stress.") (current)
• 22:46, 26 January 2011 (diff | hist) . . (+163)‎ . . N Sympatric speciation ‎ (Created page with "A form of speciation that occurs when members of a species that initially occupy the same habitat within the same range diverge into two or more different species.")
• 22:45, 26 January 2011 (diff | hist) . . (+46)‎ . . N Sympatry ‎ (Created page with "Species occurring in the same geographic area.") (current)

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