Definition for User contributions

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• 19:20, 27 January 2011 (diff | hist) . . (+53)‎ . . N Solution ‎ (Created page with "A liquid that contains one or more dissolved solutes.") (current)
• 19:20, 27 January 2011 (diff | hist) . . (+42)‎ . . N Solvent ‎ (Created page with "The liquid in which a solute is dissolved.")
• 19:19, 27 January 2011 (diff | hist) . . (+14)‎ . . N Soma ‎ (Created page with "See cell body.") (current)
• 19:19, 27 January 2011 (diff | hist) . . (+132)‎ . . N Somatic cell ‎ (Created page with "The type of cell that constitutes all cells of the body excluding the germ-line cells. Examples include skin cells and muscle cells.") (current)
• 19:18, 27 January 2011 (diff | hist) . . (+58)‎ . . N Somatic embryogenesis ‎ (Created page with "The production of plant embryos from body (somatic) cells.") (current)
• 19:18, 27 January 2011 (diff | hist) . . (+126)‎ . . N Somatic nervous system ‎ (Created page with "The division of the peripheral nervous system that senses the external environmental conditions and controls skeletal muscles.") (current)
• 19:17, 27 January 2011 (diff | hist) . . (+68)‎ . . N Somites ‎ (Created page with "Blocklike structures of mesoderm that are formed during neurulation.") (current)
• 19:17, 27 January 2011 (diff | hist) . . (+143)‎ . . N Soredia ‎ (Created page with "Small clumps of hyphae surrounding a few algal cells that can disperse in wind currents; an asexual reproductive structure produced by lichens.") (current)
• 19:16, 27 January 2011 (diff | hist) . . (+102)‎ . . N Sorting signal ‎ (Created page with "A short amino acid sequence in a protein's structure that directs the protein to its correct location.") (current)
• 19:16, 27 January 2011 (diff | hist) . . (+76)‎ . . N Source pool ‎ (Created page with "The pool of species on the mainland that is available to colonize an island.") (current)
• 19:16, 27 January 2011 (diff | hist) . . (+160)‎ . . N Southern blotting ‎ (Created page with "A method in which a labelled probe, which is a strand of DNA from a specific gene, is used to identify that gene in a mixture of many chromosomal DNA fragments.") (current)
• 19:15, 27 January 2011 (diff | hist) . . (+29)‎ . . N Speciation ‎ (Created page with "The formation of new species.") (current)
• 19:15, 27 January 2011 (diff | hist) . . (+69)‎ . . N Species ‎ (Created page with "A group of related organisms that share a distinctive form in nature.")
• 19:14, 27 January 2011 (diff | hist) . . (+135)‎ . . N Species concepts ‎ (Created page with "Different approaches for distinguishing species, including the phylogenetic, biological, evolutionary, and ecological species concepts.") (current)
• 19:14, 27 January 2011 (diff | hist) . . (+144)‎ . . N Species interactions ‎ (Created page with "A part of the study of population ecology which focuses on interactions, such as predation, competition, parasitism, mutualism and commensalism.") (current)
• 19:14, 27 January 2011 (diff | hist) . . (+38)‎ . . N Species richness ‎ (Created page with "The numbers of species in a community.")
• 19:13, 27 January 2011 (diff | hist) . . (+88)‎ . . N Species-area effect ‎ (Created page with "The relationship between the amount of available area and the number of species present.") (current)
• 19:12, 27 January 2011 (diff | hist) . . (+87)‎ . . N Specific (acquired) immunity ‎ (Created page with "An immunity defence that develops only after the body is exposed to foreign substances.") (current)
• 19:12, 27 January 2011 (diff | hist) . . (+105)‎ . . N Specific heat ‎ (Created page with "The amount of heat required per unit of mass to raise the temperature of that mass by one degree Celsius.") (current)
• 19:11, 27 January 2011 (diff | hist) . . (+163)‎ . . N Spemann's organizer ‎ (Created page with "An extremely important morphogenetic field in the early gastrula; the organizer secretes morphogens responsible for inducing the formation of a new embryonic axis.") (current)
• 19:10, 27 January 2011 (diff | hist) . . (+193)‎ . . N Sperm ‎ (Created page with "Refers to a “male” gamete that is generally smaller than the female gamete (egg); the male gamete is often motile or, in many species of plants, is transported to the egg via...")
• 19:10, 27 January 2011 (diff | hist) . . (+188)‎ . . N Sperm storage ‎ (Created page with "A method of synchronizing the production of offspring with favourable environmental conditions; female animals store and nourish sperm in their reproductive tract for long period...") (current)
• 19:09, 27 January 2011 (diff | hist) . . (+139)‎ . . N Spermatids ‎ (Created page with "In animals, the haploid cells produced by the secondary spermatocytes by meiosis II; these cells eventually differentiate into sperm cells.") (current)
• 19:09, 27 January 2011 (diff | hist) . . (+23)‎ . . N Spermatogenesis ‎ (Created page with "The formation of sperm.")
• 19:09, 27 January 2011 (diff | hist) . . (+83)‎ . . N Spermatogonia ‎ (Created page with "In animals, diploid germ cells that give rise to the male gametes, the spermatozoa.")
• 19:08, 27 January 2011 (diff | hist) . . (+43)‎ . . N Spermatophytes ‎ (Created page with "All the living and fossil seed plant phyla.") (current)
• 19:07, 27 January 2011 (diff | hist) . . (+96)‎ . . N Spicules ‎ (Created page with "Needle-like silica structures that form elaborate latticelike skeletons in some types of sponges") (current)
• 19:07, 27 January 2011 (diff | hist) . . (+144)‎ . . N Spinal cord ‎ (Created page with "In vertebrates and simpler chordates, the structure that connects the brain to all areas of the body and constitutes the central nervous system.") (current)
• 19:07, 27 January 2011 (diff | hist) . . (+72)‎ . . N Spinal nerve ‎ (Created page with "A nerve that connects the peripheral nervous system and the spinal cord.")
• 19:06, 27 January 2011 (diff | hist) . . (+74)‎ . . N Spinneret ‎ (Created page with "A spider's abdominal silk gland; also found in the mouths of caterpillars.") (current)
• 19:05, 27 January 2011 (diff | hist) . . (+61)‎ . . N Spiracle ‎ (Created page with "A pore to the trachea that is found in the bodies of insects.")
• 19:05, 27 January 2011 (diff | hist) . . (+102)‎ . . N Spiral cleavage ‎ (Created page with "A mechanism of development in which the planes of cell cleavage are oblique to the axis of the embryo.") (current)
• 19:04, 27 January 2011 (diff | hist) . . (+90)‎ . . N Spirilli ‎ (Created page with "Rigid, spiral-shaped prokaryotic cells; one of the five major shapes of prokaryotic cells.") (current)
• 19:04, 27 January 2011 (diff | hist) . . (+93)‎ . . N Spirochaetes ‎ (Created page with "Flexible, spiral-shaped prokaryotic cells; one of the five major shapes of prokaryotic cells.") (current)
• 19:03, 27 January 2011 (diff | hist) . . (+92)‎ . . N Spliceosome ‎ (Created page with "A complex of several subunits known as snRNPs that removes introns from eukaryotic pre-mRNA.") (current)
• 19:03, 27 January 2011 (diff | hist) . . (+101)‎ . . N Splicing ‎ (Created page with "The process whereby introns are removed from RNA and the remaining exons are connected to each other.") (current)
• 19:02, 27 January 2011 (diff | hist) . . (+57)‎ . . N Spongin ‎ (Created page with " A tough protein that lends skeletal support to a sponge.")
• 19:02, 27 January 2011 (diff | hist) . . (+41)‎ . . N Spongocoel ‎ (Created page with "A central cavity in the body of a sponge.") (current)
• 19:01, 27 January 2011 (diff | hist) . . (+104)‎ . . N Spongy parenchyma ‎ (Created page with " Photosynthetic tissue of the plant leaf mesophyll that contains cells separated by abundant air spaces.")
• 19:00, 27 January 2011 (diff | hist) . . (+64)‎ . . N Spontaneous mutation ‎ (Created page with "A mutation resulting from abnormalities in biological processes.") (current)
• 19:00, 27 January 2011 (diff | hist) . . (+79)‎ . . N Sporangia ‎ (Created page with " Structures that produce and disperse the spores of plants, fungi, or protists.")
• 19:00, 27 January 2011 (diff | hist) . . (+184)‎ . . N Spore ‎ (Created page with " Single-celled reproductive structure that is dispersed into the environment and is able to grow into new fungal hyphae, plant gametophytes, or protists if it finds a suitable ha...")
• 18:59, 27 January 2011 (diff | hist) . . (+31)‎ . . N Sporic life cycle ‎ (Created page with " See alternation of generations") (current)
• 18:59, 27 January 2011 (diff | hist) . . (+156)‎ . . N Sporophyte ‎ (Created page with "The diploid generation of plants or multicellular protists that have a sporic life cycle; this generation produces haploid spores by the process of meiosis.") (current)
• 18:58, 27 January 2011 (diff | hist) . . (+128)‎ . . N Sporopollenin ‎ (Created page with "The tough material that composes much of the walls of plant spores and helps to prevent cellular damage during transport in air.") (current)
• 18:57, 27 January 2011 (diff | hist) . . (+102)‎ . . N Stabilizing selection ‎ (Created page with " A pattern of natural selection that favours the survival of individuals with intermediate phenotypes.")
• 18:57, 27 January 2011 (diff | hist) . . (+59)‎ . . N Stamen ‎ (Created page with "A flower structure that makes the male gametophyte, pollen.")
• 18:57, 27 January 2011 (diff | hist) . . (+171)‎ . . N Standard metabolic rate (SMR) ‎ (Created page with "A method for measuring the BMR of ectotherms at a standard temperature for each species—one that approximates the average temperature that a species normally encounters.") (current)
• 18:56, 27 January 2011 (diff | hist) . . (+60)‎ . . N Standing crop ‎ (Created page with " The total biomass in an ecosystem at any one point in time.") (current)
• 18:55, 27 January 2011 (diff | hist) . . (+73)‎ . . N Starch ‎ (Created page with "A polysaccharide produced by the cells of plants and some algal protists.")

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