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- Zygotic life cycle (00:38, 26 January 2011)
- Zygote (00:39, 26 January 2011)
- Zygospore (00:39, 26 January 2011)
- Zygomycete (00:40, 26 January 2011)
- Zone of maturation (00:41, 26 January 2011)
- Zone of elongation (00:41, 26 January 2011)
- Zoecium (00:41, 26 January 2011)
- Zero population growth (00:42, 26 January 2011)
- Z scheme (00:42, 26 January 2011)
- Z line (00:42, 26 January 2011)
- Yolk sac (00:42, 26 January 2011)
- Yeast (00:42, 26 January 2011)
- Xylem loading (00:43, 26 January 2011)
- Xylem (00:43, 26 January 2011)
- X-ray crystallography (00:43, 26 January 2011)
- X-linked inheritance (00:43, 26 January 2011)
- X-inactivation centre (Xic) (00:44, 26 January 2011)
- Xenoestrogen (00:44, 26 January 2011)
- Woody plant (00:44, 26 January 2011)
- Wood (00:45, 26 January 2011)
- Wild-type allele (00:45, 26 January 2011)
- Whorls (00:45, 26 January 2011)
- White matter (00:45, 26 January 2011)
- Weathering (00:46, 26 January 2011)
- Weak acid (00:46, 26 January 2011)
- Waxy cuticle (00:46, 26 January 2011)
- Wavelength (00:46, 26 January 2011)
- Water vascular system (00:47, 26 January 2011)
- V-snare (00:48, 26 January 2011)
- Voltage-gated channel (00:48, 26 January 2011)
- Volt (00:48, 26 January 2011)
- Viviparous (00:48, 26 January 2011)
- Viviparity (00:49, 26 January 2011)
- Vitreous humour (00:49, 26 January 2011)
- Vitamin (00:50, 26 January 2011)
- Virus (00:50, 26 January 2011)
- Virulent phage (11:38, 26 January 2011)
- Virulence (11:40, 26 January 2011)
- Viroid (11:40, 26 January 2011)
- Viral vector (11:41, 26 January 2011)
- Viral reproductive cycle (11:42, 26 January 2011)
- Viral genome (11:42, 26 January 2011)
- Viral envelope (11:42, 26 January 2011)
- Villi (11:43, 26 January 2011)
- Vibrios (11:43, 26 January 2011)
- Vestigial structure (11:44, 26 January 2011)
- Vertical evolution (11:46, 26 January 2011)
- Vertebrate (11:47, 26 January 2011)
- Vertebrae (11:48, 26 January 2011)
- Venule (11:48, 26 January 2011)
- Ventilation (11:50, 26 January 2011)
- Veliger (11:52, 26 January 2011)
- Vegetative growth (11:53, 26 January 2011)
- Vegetal pole (11:54, 26 January 2011)
- Vasotocin (11:55, 26 January 2011)
- Vasodilation (11:56, 26 January 2011)
- Vasoconstriction (11:57, 26 January 2011)
- Vascular tissue (11:58, 26 January 2011)
- Vascular plant (11:58, 26 January 2011)
- Vascular cambium (11:59, 26 January 2011)
- Vascular bundle (11:59, 26 January 2011)
- Vaccination (12:00, 26 January 2011)
- Vacuole (12:00, 26 January 2011)
- Vagina (12:01, 26 January 2011)
- Vaginal diaphragm (12:01, 26 January 2011)
- Valence electron (12:02, 26 January 2011)
- Variable region (12:02, 26 January 2011)
- Abiotic (12:04, 26 January 2011)
- Aboral (12:04, 26 January 2011)
- Wall potential (15:26, 26 January 2011)
- Uterus (15:42, 26 January 2011)
- Abscisic acid (16:44, 26 January 2011)
- Uterine cycle (16:44, 26 January 2011)
- Urine (16:45, 26 January 2011)
- Urinary system (17:13, 26 January 2011)
- Urinary bladder (17:14, 26 January 2011)
- Uric acid (17:14, 26 January 2011)
- Urethra (17:15, 26 January 2011)
- Ureter (17:15, 26 January 2011)
- Uremia (17:16, 26 January 2011)
- Urea (17:16, 26 January 2011)
- Uracil (17:17, 26 January 2011)
- Unsaturated (17:17, 26 January 2011)
- Unsaturated fatty acid (17:18, 26 January 2011)
- Unipotent (17:18, 26 January 2011)
- Uniporter (17:19, 26 January 2011)
- Uniform (17:20, 26 January 2011)
- Umbrella species (19:41, 26 January 2011)
- Ultimate causation (19:42, 26 January 2011)
- Ubiquitin (20:18, 26 January 2011)
- Type 1 diabetes mellitus (20:18, 26 January 2011)
- Two-dimensional (2D) gel electrophoresis (20:18, 26 January 2011)
- Two-component regulatory system: (20:19, 26 January 2011)
- Turgor pressure (20:19, 26 January 2011)
- Turgid (20:20, 26 January 2011)
- Tunic (20:20, 26 January 2011)
- Tumour-suppressor gene (20:20, 26 January 2011)
- Tumour (20:21, 26 January 2011)
- Tube feet (20:21, 26 January 2011)
- Tube cell (20:21, 26 January 2011)
- Tubal ligation (20:21, 26 January 2011)
- T-snare (20:22, 26 January 2011)
- Trypsin (20:22, 26 January 2011)
- Tryglicerides (20:22, 26 January 2011)
- True-breeding line (20:22, 26 January 2011)
- Troponin (20:23, 26 January 2011)
- Tropomyosin (20:23, 26 January 2011)
- Trophic-level transfer efficiency (20:23, 26 January 2011)
- Trochophore larva (20:24, 26 January 2011)
- Trisomic (20:24, 26 January 2011)
- Triploid (20:24, 26 January 2011)
- Triploblastic (20:25, 26 January 2011)
- Triplet (22:14, 26 January 2011)
- Triiodothyronine (22:16, 26 January 2011)
- Trichromatic colour vision (22:16, 26 January 2011)
- Trichome (22:16, 26 January 2011)
- Transverse tubules (22:17, 26 January 2011)
- Transposition (22:17, 26 January 2011)
- Transposable element (22:18, 26 January 2011)
- Transporter (22:18, 26 January 2011)
- Transpiration (22:18, 26 January 2011)
- Transmembrane transport (22:18, 26 January 2011)
- Transmembrane protein (22:19, 26 January 2011)
- Transmembrane gradient (22:19, 26 January 2011)
- Translocation (22:19, 26 January 2011)
- Transitional form (22:19, 26 January 2011)
- Transition state (22:20, 26 January 2011)
- Transgenic (22:20, 26 January 2011)
- Transfection (22:21, 26 January 2011)
- Transepithelial transport (22:21, 26 January 2011)
- Trans-effect (22:21, 26 January 2011)
- Transduction (22:21, 26 January 2011)
- Transcriptional start site (22:22, 26 January 2011)
- Trait (22:23, 26 January 2011)
- Traffic signal (22:23, 26 January 2011)
- Tract (22:23, 26 January 2011)
- Tracheophytes (22:24, 26 January 2011)
- Tracheid (22:24, 26 January 2011)
- Tracheary elements (22:24, 26 January 2011)
- Tracheal system (22:24, 26 January 2011)
- Totipotent (22:25, 26 January 2011)
- Total peripheral resistance (22:25, 26 January 2011)
- Total fertility rate (22:25, 26 January 2011)
- Torus (22:26, 26 January 2011)
- Tight junction (22:27, 26 January 2011)
- Ti plasmid (22:27, 26 January 2011)
- Thyroxine (22:27, 26 January 2011)
- Thyroglobulin (22:28, 26 January 2011)
- Thymine dimer (22:28, 26 January 2011)
- Thylakoid membrane (22:29, 26 January 2011)
- Thylakoid lumen (22:29, 26 January 2011)
- Thrombocytes (22:29, 26 January 2011)
- Threshold potential (22:29, 26 January 2011)
- Threshold concentration (22:30, 26 January 2011)
- Threatened species (22:30, 26 January 2011)
- Thoracic breathing (22:30, 26 January 2011)
- 30-nm fibre (22:30, 26 January 2011)
- Thin filament (22:31, 26 January 2011)
- Thigmotropism (22:31, 26 January 2011)
- Thick filament (22:31, 26 January 2011)
- Theropods (22:31, 26 January 2011)
- Thermodynamics (22:32, 26 January 2011)
- Theory (22:32, 26 January 2011)
- Thalamus (22:32, 26 January 2011)
- Tetrapod (22:32, 26 January 2011)
- Tetraploid (22:33, 26 January 2011)
- Tertiary structure (22:33, 26 January 2011)
- Tertiary plastid (22:34, 26 January 2011)
- Tertiary endosymbiosis (22:34, 26 January 2011)
- Tertiary consumer (22:34, 26 January 2011)
- Territory (22:34, 26 January 2011)
- Terpenoids (22:34, 26 January 2011)
- Terminator (22:35, 26 January 2011)
- Termination stage (22:35, 26 January 2011)
- Template (22:35, 26 January 2011)
- Telophase (22:35, 26 January 2011)
- Telomere (22:36, 26 January 2011)
- Taxon (22:37, 26 January 2011)
- Taxis (22:37, 26 January 2011)
- Taste buds (22:37, 26 January 2011)
- Taq polymerase (22:38, 26 January 2011)
- Taproot system (22:38, 26 January 2011)
- Tapetum lucidum (22:39, 26 January 2011)
- Tagmata (22:39, 26 January 2011)
- T cell (22:39, 26 January 2011)
- Systole (22:39, 26 January 2011)
- Systemic hypertension (22:40, 26 January 2011)
- Systemic acquired resistance (SAR) (22:41, 26 January 2011)
- Systematics (22:41, 26 January 2011)
- Synergids (22:41, 26 January 2011)
- Synaptic signalling (22:41, 26 January 2011)
- Synaptic plasticity: (22:42, 26 January 2011)
- Synaptic integration (22:42, 26 January 2011)
- Synaptic cleft (22:42, 26 January 2011)
- Symporter (22:45, 26 January 2011)
- Symplastic transport (22:45, 26 January 2011)
- Symplast (22:45, 26 January 2011)
- Sympatry (22:45, 26 January 2011)
- Sympathetic division (22:48, 26 January 2011)
- Symbiotic (22:49, 26 January 2011)
- Swimmeret (22:49, 26 January 2011)
- Swim bladder (22:49, 26 January 2011)
- Suspensor (22:50, 26 January 2011)
- Suspension feeder (22:50, 26 January 2011)
- Survivorship curve (22:50, 26 January 2011)
- Surface area/volume (SA/V) ratio (22:51, 26 January 2011)
- Supercoiling (22:52, 26 January 2011)
- Sum rule (22:52, 26 January 2011)
- Sugar source (22:52, 26 January 2011)
- Sugar sink (22:53, 26 January 2011)
- Substrates (22:53, 26 January 2011)
- Subsidence zones (22:53, 26 January 2011)
- Submetacentric (22:54, 26 January 2011)
- Stylet (22:54, 26 January 2011)
- Style (22:54, 26 January 2011)
- Structural isomers (22:54, 26 January 2011)
- Structural genomics (22:55, 26 January 2011)
- Strong acid (22:56, 26 January 2011)
- Stromatolite (22:56, 26 January 2011)
- Stroma (22:56, 26 January 2011)
- Stroke volume (SV) (22:56, 26 January 2011)
- Striated muscle (22:57, 26 January 2011)
- Stretch receptor (22:57, 26 January 2011)
- Strand (22:57, 26 January 2011)
- Termination codon (22:58, 26 January 2011)
- Stigma (22:59, 26 January 2011)
- Sticky ends (22:59, 26 January 2011)
- Steroid receptor (22:59, 26 January 2011)
- Steroid (23:00, 26 January 2011)
- Sternum (23:01, 26 January 2011)
- Stereoisomers (23:01, 26 January 2011)
- Stem (23:02, 26 January 2011)
- Statoliths (23:02, 26 January 2011)
- Statocyst (23:03, 26 January 2011)
- Standing crop (18:56, 27 January 2011)
- Standard metabolic rate (SMR) (18:57, 27 January 2011)
- Sporopollenin (18:58, 27 January 2011)
- Sporophyte (18:59, 27 January 2011)
- Sporic life cycle (18:59, 27 January 2011)
- Spontaneous mutation (19:00, 27 January 2011)
- Spongocoel (19:02, 27 January 2011)
- Splicing (19:03, 27 January 2011)
- Spliceosome (19:03, 27 January 2011)
- Spirochaetes (19:04, 27 January 2011)
- Spirilli (19:04, 27 January 2011)
- Spiral cleavage (19:05, 27 January 2011)
- Spinneret (19:06, 27 January 2011)
- Spinal cord (19:07, 27 January 2011)
- Spicules (19:07, 27 January 2011)
- Spermatophytes (19:08, 27 January 2011)