Definition for User contributions

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)

• 18:25, 16 February 2011 (diff | hist) . . (+69)‎ . . N Behaviour ‎ (Created page with "The observable response of organisms to external or internal stimuli.")
• 18:24, 16 February 2011 (diff | hist) . . (+226)‎ . . N Basophil ‎ (Created page with "A cell that secretes the anticlotting factor heparin at the site of an infection, which helps the circulation flush out the infected site; basophils also secrete histamine, which...") (current)
• 18:24, 16 February 2011 (diff | hist) . . (+42)‎ . . N Basidiospore ‎ (Created page with "A sexual spore of the basidiomycete fungi.") (current)
• 18:24, 16 February 2011 (diff | hist) . . (+102)‎ . . N Basidiomycetes ‎ (Created page with "A group of fungi whose sexual spores are produced on the surfaces of club-shaped structures (basidia).") (current)
• 18:24, 16 February 2011 (diff | hist) . . (+58)‎ . . N Basidiocarp ‎ (Created page with "The type of fruiting body produced by basidiomycete fungi.") (current)
• 18:23, 16 February 2011 (diff | hist) . . (+78)‎ . . N Basidia ‎ (Created page with "Club-shaped structures on which the sexual spores of basidiocarp are produced.") (current)
• 18:23, 16 February 2011 (diff | hist) . . (+83)‎ . . N Basic local alignment search tool (BLAST) ‎ (Created page with "A computer program that can identify homologous genes that are found in a database.") (current)
• 18:23, 16 February 2011 (diff | hist) . . (+87)‎ . . N Base substitution ‎ (Created page with "A mutation that involves the substitution of a single base in the DNA for another base.") (current)
• 18:22, 16 February 2011 (diff | hist) . . (+90)‎ . . N Base pair ‎ (Created page with "The structure in which two bases in opposite strands of DNA hydrogen bond with each other.") (current)
• 18:22, 16 February 2011 (diff | hist) . . (+163)‎ . . N Base ‎ (Created page with "1. A component of nucleotides that is a single or double ring of carbon and nitrogen atoms. 2. A molecule that when dissolved in water lowers the H+ concentration.") (current)
• 18:22, 16 February 2011 (diff | hist) . . (+125)‎ . . N Basal transcription apparatus ‎ (Created page with "For a eukaryotic structural gene, refers to the complex of GTFs, RNA polymerase II, and a DNA sequence containing a TATA box.") (current)
• 18:21, 16 February 2011 (diff | hist) . . (+62)‎ . . N Basal transcription ‎ (Created page with "A low level of transcription resulting from the core promoter.") (current)
• 18:21, 16 February 2011 (diff | hist) . . (+46)‎ . . N Basal region ‎ (Created page with "The region of a plant that produces the roots.") (current)
• 18:21, 16 February 2011 (diff | hist) . . (+230)‎ . . N Basal nuclei ‎ (Created page with "Clusters of neuronal cell bodies that surround the thalamus on both sides and lie beneath the cerebral cortex; involved in planning and learning movements and also function via a...") (current)
• 18:20, 16 February 2011 (diff | hist) . . (+107)‎ . . N Basal metabolic rate (BMR) ‎ (Created page with "The metabolic rate of an animal under resting conditions, in good health, and not under stress of any kind.")
• 18:20, 16 February 2011 (diff | hist) . . (+32)‎ . . N Barr body ‎ (Created page with "A highly condensed X chromosome.")
• 18:20, 16 February 2011 (diff | hist) . . (+187)‎ . . N Baroreceptor ‎ (Created page with "A pressure-sensitive region within the walls of certain arteries that contains the endings of nerve cells; these regions help to maintain blood pressure in the normal range for a...") (current)
• 18:20, 16 February 2011 (diff | hist) . . (+263)‎ . . N Balloon angioplasty ‎ (Created page with "A common treatment to restore blood flow through a blood vessel. A thin tube with a tiny, inflatable balloon at its tip is threaded through the artery to the diseased area; infla...") (current)
• 18:19, 16 February 2011 (diff | hist) . . (+77)‎ . . N Balancing selection ‎ (Created page with "A type of natural selection that maintains genetic diversity in a population.") (current)
• 18:19, 16 February 2011 (diff | hist) . . (+131)‎ . . N Balanced polymorphism ‎ (Created page with "The phenomenon in which two or more alleles are kept in balance and therefore are maintained in a population over many generations.") (current)
• 18:18, 16 February 2011 (diff | hist) . . (+65)‎ . . N Baculum ‎ (Created page with "A bone in the penis of a number of mammals that aids in erection.") (current)
• 18:18, 16 February 2011 (diff | hist) . . (+102)‎ . . N Bacteroid ‎ (Created page with "A modified bacterial cell of the type known as rhizobia present in mature root nodules of some plants.") (current)
• 18:18, 16 February 2011 (diff | hist) . . (+30)‎ . . N Bacteriophage (or phage) ‎ (Created page with "A virus that infects bacteria.") (current)
• 18:18, 16 February 2011 (diff | hist) . . (+65)‎ . . N Bacterial colony ‎ (Created page with "A clone of genetically identical cells formed from a single cell.") (current)
• 18:17, 16 February 2011 (diff | hist) . . (+64)‎ . . N Bacterial artificial chromosome (BAC) ‎ (Created page with "A cloning vector in bacteria that can contain large DNA inserts.") (current)
• 18:17, 16 February 2011 (diff | hist) . . (+153)‎ . . N Bacteria ‎ (Created page with "One of the three domains of life; the other two are Archaea and Eukarya. When not capitalized, it refers to a cell or species within the domain Bacteria.")
• 18:16, 16 February 2011 (diff | hist) . . (+80)‎ . . N Backbone ‎ (Created page with "The linear arrangement of phosphates and sugar molecules in a DNA or RNA strand.")
• 18:16, 16 February 2011 (diff | hist) . . (+56)‎ . . N Bacilli ‎ (Created page with "Rods; one of the five major shapes of prokaryotic cells.") (current)
• 18:16, 16 February 2011 (diff | hist) . . (+55)‎ . . N B cell ‎ (Created page with "A type of lymphocyte responsible for specific immunity.") (current)
• 18:15, 16 February 2011 (diff | hist) . . (+131)‎ . . N Axoneme ‎ (Created page with "The internal structure of eukaryotic cilia and flagella consisting of microtubules, the motor protein dynein, and linking proteins.") (current)
• 18:15, 16 February 2011 (diff | hist) . . (+46)‎ . . N Axon hillock ‎ (Created page with "The part of the axon closest to the cell body.")
• 18:14, 16 February 2011 (diff | hist) . . (+108)‎ . . N Axon ‎ (Created page with "An extension of the plasma membrane that is involved in sending signals from a neuron to neighbouring cells.") (current)
• 18:14, 16 February 2011 (diff | hist) . . (+83)‎ . . N Axillary bud ‎ (Created page with "A bud that occurs in the axil, the upper angle where a twig or leaf joins the stem.") (current)
• 18:14, 16 February 2011 (diff | hist) . . (+132)‎ . . N Avogadro's constant ‎ (Created page with "As first described by Italian physicist Amedeo Avogadro, 1 mole of any element contains the same number of particles: 6.022 × 1023.")
• 18:13, 16 February 2011 (diff | hist) . . (+79)‎ . . N Avirulence gene (Avr gene) ‎ (Created page with "A gene that encodes a virulence-enhancing elicitor, which causes plant disease.") (current)
• 18:12, 16 February 2011 (diff | hist) . . (+65)‎ . . N Auxin-response genes ‎ (Created page with "A diverse set of genes that are promoted into expression by auxin") (current)
• 18:12, 16 February 2011 (diff | hist) . . (+197)‎ . . N Auxin ‎ (Created page with "One of several types of hormones considered to be the “master” plant hormones because they influence plant structure, development, and behaviour in many ways, often working w...")
• 18:11, 16 February 2011 (diff | hist) . . (+65)‎ . . N Auxin influx carrier ‎ (Created page with "A plasma membrane protein that transports auxin into plant cells.") (current)
• 18:10, 16 February 2011 (diff | hist) . . (+79)‎ . . N Auxin efflux carrier ‎ (Created page with "One of several types of PIN proteins, which transport auxin out of plant cells.") (current)
• 18:09, 16 February 2011 (diff | hist) . . (+110)‎ . . N Autotroph ‎ (Created page with "An organism that has metabolic pathways that directly harness energy from either inorganic molecules or light.") (current)
• 18:08, 16 February 2011 (diff | hist) . . (+108)‎ . . N Autotomy ‎ (Created page with "In echinoderms, the ability to intentionally detach a body part, such as a limb, that will later regenerate.") (current)
• 18:07, 16 February 2011 (diff | hist) . . (+92)‎ . . N Autosomes ‎ (Created page with "All the chromosomes found in the cell nucleus of eukaryotes, except for the sex chromosomes.") (current)
• 18:07, 16 February 2011 (diff | hist) . . (+158)‎ . . N Autophagy ‎ (Created page with "Meaning “the eating of one's self.” A process whereby cellular material, such as a worn-out organelle, becomes enclosed in a double membrane and degraded.") (current)
• 18:06, 16 February 2011 (diff | hist) . . (+86)‎ . . N Autophagosome ‎ (Created page with "Cellular material enclosed in a double membrane, produced by the process of autophagy.") (current)
• 18:06, 16 February 2011 (diff | hist) . . (+133)‎ . . N Autonomic nervous system ‎ (Created page with "The division of the peripheral nervous system that regulates homeostasis and organ function; also called the visceral nervous system.")
• 18:05, 16 February 2011 (diff | hist) . . (+238)‎ . . N Autoimmune disease ‎ (Created page with "In humans and many other vertebrates, the situation in which the body's normal state of immune tolerance breaks down, with the result that antibody-mediated or T-cell-mediated at...") (current)
• 18:05, 16 February 2011 (diff | hist) . . (+21)‎ . . N Audition ‎ (Created page with "The sense of hearing.") (current)
• 18:04, 16 February 2011 (diff | hist) . . (+56)‎ . . N Atropine ‎ (Created page with "A potent toxin derived from the deadly nightshade plant.") (current)
• 18:03, 16 February 2011 (diff | hist) . . (+57)‎ . . N Atrophy ‎ (Created page with "A reduction in the size of a structure, such as a muscle.") (current)
• 18:02, 16 February 2011 (diff | hist) . . (+76)‎ . . N Atrium ‎ (Created page with "In the heart, a single filling chamber that collects blood from the tissues.") (current)

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)