long

X chromosome

..., two of their opsin genes are (like our mid- and long - wave sensitive opsins) on the X chromosome . Full article >>> The morphologists' results led geneticists to believe that in the male fruit fly all sex-linked character s are on a single trans ferrable unit, the observable se x ...

Virulence

...s complex, and has important consequences for the long term evolution of a pathogen . If a disease is rapidly fatal, the host may die before the microbe can get passed along to another host . Full article >>> Some bacteriophages contribute to the virulence of bacteria l infec...

Vessels

...he blood vessels . Waxes Waxes are composed of a long -chain fatty acid bonded to a long -chain alcohol ... Full article >>>...

Vertebrates

..., consisting of a message roughly 2,000 letters long , is typically broken into submessages called " exons . Full article >>> larva -- Among in vertebrates , an immature stage in the life cycle which usually is much smaller than, and morphologically different from, the adult. In inse...

Vascular system

...alterations may have significant implications for long -term programming of the fetal cardio vascular system . Full article >>> trans piration Passage of water from the roots of a plant to the atmosphere via the vascular system and the stomata of the leaves. trans porters Protei...

Vascular bundles

...scular arrangement -- Vascular tissue occurs in long strand s called vascular bundles . These bundles are arranged within the stem of dicot s to form a cylinder, appearing as a ring of spots when you cut across the stem . Full article >>> pith ray The region or tissue located ...

Vascular bundle

...scular arrangement -- Vascular tissue occurs in long strand s called vascular bundle s . These bundles are arranged within the stem of dicot s to form a cylinder, appearing as a ring of spots when you cut across the stem . Full article >>>...

Uterus

...erus of their female camels before starting on a long trek. This prevented the animal from becoming pregnant on the journey. The intrauterine device (IUD) used by some 2% of U. Full article >>> The developing individual is first called a zygote ; as it grows through successive stages...

Ureter

...into the ureter . ureter : A narrow tube 40 cm long and 4 mm in diameter. Passing from the renal pelvis out of the hilus and down to the bladder. Full article >>> Smooth muscle or " involuntary muscle " is found within the walls of organ s and structures such as the o esophagus , ...

Unicellular

...ed uniform over time and that slight changes over long periods can have large- scale consequences; proposed by James Hutton in 1795 and re? Full article >>> Unicellular or multicellular photosynthetic eukaryotes that generally lack roots , stems, leaves, conducting vessels , and co...

Tumor suppressor

...nt allele behaves as a recessive ; that is, as long as the cell contains one normal allele , tumor suppression continues. Full article >>> Dr. Lawrence Brody, of the National Human Genome Research Institute's Genetic and Molecular Biology Branch, defines tumor suppressor ...

Tumor

...nt allele behaves as a recessive ; that is, as long as the cell contains one normal allele , tumor suppression continues. Full article >>> Tumor s of epithelial origin . squamous epithelium: squamous cell papilloma , squamous cell carcinoma transition al epithelium: tra...

Tubulin

...bulin . Tubulin dimer s are arranged to form a long hollow cylinder. The fibers are lengthened and shortened as tubulin dimer s assemble or disassemble from one or both ends of the filament. Full article >>> grow at each end by the polymerization of tubulin dimer s (powered by th...

Transverse

...nsverse cut A section cut at right angles to the long axis. Also termed a cross section. transverse plane A plane or section that lies or passes across a body or structure. Full article >>> transverse Lying or placed across or crosswise traverse muscle s Fibers run ventral ly and...

Transposon

...rse transcriptase . Within their character istic long terminal repeats (LTRs), some retro transposon s encode retroviral-like proteins (e.g. Full article >>> The number of Tn10 transposon s in E. coli genome s is maintained at a constant low level. DNA replication is required ...

Transgenic animal

...ommon genetic profile with another animals . How long does it take for a goat to produce milk? Full article >>> See Transgenic animal , Transgenic plant . Transgenic animal . Genetically enginnered animal or offspring of genetically engineered animals . Full article >>&#...

Transgenic

...ommon genetic profile with another animals . How long does it take for a goat to produce milk? Full article >>> See Transgenic . Transgenic . An organ ism in which a foreign DNA gene (a trans gene) is incorporated into its genome early in de- velopment. Full article >>...

Transcriptase

...e transcriptase . Within their character istic long terminal repeats (LTRs), some retrotransposons encode retroviral-like proteins (e.g. Full article >>> While transcription was class ically thought to only occur from DNA to RNA , reverse transcriptase trans cribes RN...

Trait

...e two prominent segment s of a chromosome ; the long or "q" arm is the other. The arms of a given chromosome join at its centromere . Full article >>> The observable trait s or character istics of an organ ism, for example hair color, weight, or the presence or absence of a diseas...

Trachea

trachea l tube rather long tube of the plant xylem , composed of several hollow, elongated plant cells fused end to end Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... Full article >>> Trachea l Breathing ...

Tissue

...scular arrangement -- Vascular tissue occurs in long strand s called vascular bundles . These bundles are arranged within the stem of dicot s to form a cylinder, appearing as a ring of spots when you cut across the stem . Full article >>> One C base of the apoB m RNA transcrip...

Tibia

...>>> tibia The anterior of the two long bones articulating in the hind limb . In human ...>> the tibia ). The central shaft of a long bone is called the diaphysis, and has a hollow middle - the medulla r cavity - filled with bone ma...

Thallus

...ick, usually heart - or kidney -shaped, 3-10 mm long and 2-8 mm broad. The thallus produces gametes by means of: ... Full article >>> pro thallus In ferns, a small heart -shaped bi sexual gametophyte . PICTURE ... Full article >>> When seen under magnification, a ...

Thalamus

...r homosexuals versus heterosexuals. But we have a long way to go on that. Full article >>>...

Telson

...opods. May be flat and paddlelike, buttonlike, or long and spiny, as in the horseshoe crabs. Full artic...d on this ... Full article >>> The long , unsegmented telson projects to the rear. They possess book gills that resemble the pages in a ...

Suppressor

...nt allele behaves as a recessive ; that is, as long as the cell contains one normal allele , tumor suppression continues. Full article >>> A mutation that can suppress a variety of other mutation s; typically a non sense suppressor . A B C D E F G H I J K L M N O P Q R S ...

Suppression

...#62; A pest management strategy that focuses on long -term prevention or suppression of pest problems...plant ) can be implanted under the skin and offer long -term suppression of ovulation . RU-486, the so-called morning after pill, interferes with implan...

Survival

...physiological state that allows survival during long periods of cold temperatures and reduced food supplies, in which metabolism decreases, the heart and respiratory system slow down, and body temperature is maintained at a lower level than normal. Full article >>> K-strategist Spe...

Striated muscle

...ils with marked striations at right angles to the long axis. The muscle is concerned with movement of ... striated muscle . It also is often sustained for long periods. This, too, is called tonus but the mechanism is not like that in skeletal muscle . Muscl...

Striate

...ils with marked striations at right angles to the long axis. The muscle is concerned with movement of ...ibers have alternating bands perpendicular to the long axis of the cell . These cells function in conjunction with the skeletal system for voluntary m...

Strand

...>> DNA ( deoxyribonucleic acid ): The long , spiralling m olecule that rchestrates the cell 's daily operations and provides the genetic blueprint for the physical character istics of all living organ isms. When made up of two strand s, ... Full article >>> transcription :...

Stop codon

... opal codon ). Full article >>> A long DNA sequence that is unin- terrupted by a stop codon and encodes part or all of a protein . (See Reading frame .) Operator . Full article >>> termination codon s stop codon s. termination factors Protein factors of the cyt...

Stolon

...lon . Full article >>> stolon A long slender stem running along the surface of the ground, arising from the axil of a leaf , whose function is to enable rapid vegetative propagation in an area. Runners are found, for example, in strawberries and creeping buttercup. Full article ...

Stem

...scular arrangement -- Vascular tissue occurs in long strand s called vascular bundles . These bundles are arranged within the stem of dicot s to form a cylinder, appearing as a ring of spots when you cut across the stem . Full article >>> Stem Cell s Therapeutic cloning , also...

Stem cell

...ommon, self-regenerating cells in the marrow of long bones that give rise, by differentiation and d...hite blood cells , however, are short-lived and a long -term solution is to apply this technique to the cells that produce the white blood cells (calle...

Stalk

...;> During the day, the rods are extended on long stalk s so that their sensitive parts are buried in a layer of pigment ed epithelium. Full article >>> A stalk -like connection between somite s and lateral plate mesoderm which anteriorly forms the pronephos and posterior ly...

Starch

...2; For example, Thai or Siamese Jasmine rice is long -grain and relatively less sticky, as long -grain rice contains less starch than short-grain varieties. Chinese restaurants usually serve lo...

Spleen

...one The inner layer of bone; found at the ends of long bones and is less dense than compact bone. Some spongy bone contains red marrow. Full article >>> spleen (Frog, Rat) An important part of the mononuclear phagocyte system, make up of lymph oid tissue . It stores excess red bloo...

Speciation

... through hybridization and/or polyploid y has long been considered much less important in animals than in plant s [[[refs.]]]. A number of reviews suggest that this view may be mistaken. Full article >>> Sympatric speciation happens when members of a population develop some g...

Small intestine

... small intestine is a coiled tube over 3 meters long . Coils and folding plus villi give this 3m tube the surface area of a 500-600m long tube. Full article >>> small intestine : the site of chemical digestion ; includ...

Skeletal muscle

...le >>> Skeletal muscle is made of long fibers whose contr action provides the force of locomotion and other voluntary body movements. Full article >>> Skeletal muscle is arranged in discrete groups, examples of which include the biceps brachii. It is connected by ten...

Sister Chromatids

... Sister chromatids consist of exact copies of a long coiled DNA molecule with associated proteins . Full article >>> - Chromosome - Daughter Cell - Sister Chromatids Definition: Chromosome resulting from the separation of sister chromatids . Full article >>> ...

Sister chromatid

... Sister chromatid s consist of exact copies of a long coiled DNA molecule with associated proteins . Full article >>> Anaphase the sister chromatid s separates and chromosomes pull apart identical copies are pulled part to each side of the cell by the spindle fibers ......

Sieve tubes

...icle >>> sieve tubes A series of long cells lying end to end and forming a tube, found in the phloem of Angiosperm s. Covered in Lab 9 Seed Plant Sporophyte simple eye (ocellus) a single eye with a single lens found in insects and some other invertebrates . Full article ...

Shotgun sequencing

...ents of DNA built from short fragments, e.g., a long contig uous DNA sequence assembled from shotgun sequencing . Related Shotgun sequencing ... Full article >>>...

Short arm

...e two prominent segment s of a chromosome ; the long or "q" arm is the other. The arms of a given chr...ocentric ; that is, the centromere connects one long and one very short arm . Acrocentric chromosomes are at risk of translocation s that fuse the...

Sex-linked

...e two prominent segment s of a chromosome ; the long or "q" arm is the other. The arms of a given chromosome join at its centromere . Full article >>> Identify sex-linked , co- dominant , incomplete dominant , multiple allele , polygenic trait s - Analyze sample pedigree s; d...

Sepal

...l article >>> Habenaria hookeri - a long -spurred orchid with base leaves and petal s converging under the upper sepal Synonyms: Hooker's orchid By Wordnet Dictionary ... Full article >>>...

Sensory neurons

...the nucleus of Aplysia sensory neurons blocks long -term facilitation.". Nature 345 (6277): 718-21. PMID 2141668. ^ Bartsch D, Casadio A, Karl KA, Serodio P, Kandel ER (1998). Full article >>> The neuron s that take in information from the environment are called sensory neurons . ...

Scolex

... wall. Behind the head is a short neck and then a long string of proglottid s. Full article >>>...

Satellite RNA

...y replicate by a rolling circle mechanism. The long multi-unit RNA s cleave in vitro without the addition of cleavage enzymes . Full article >>> Some viroidlike molecule s get into the cell as passengers inside a conventional plant virus . These are called virus oids or viro...

S1 nuclease

... ) and ribonucleic acid ( RNA ), are made up of long chains of molecule s called nucleotide s. See DNA , RNA , Nucleotide s. Full article >>>...

Roots

...han two years Phreatophyte: A desert shrub with a long trap root that enables ... Full article >>> They trace their roots back to 1986 when we accepted a contract with the National Cancer Institute to collect and survey African plant species in an attempt to develop new anti- canc...

Rolling circle

...y replicate by a rolling circle mechanism. The long multi-unit RNA s cleave in vitro without the addition of cleavage enzymes . RNA ligation is required to reform circles. Full article >>> Rolling circle (sigma) replication A type of DNA replication where a replication ...

RNA

...>>> Some t RNA s are synthesized in long precursors containing several t RNA s and are released by endonucleotlytic processing . Facts ... Full article >>> Transfer RNA . Small RNA molecule s that carry amino acids to the ribosome for polymerization into a polype...

Ribosome

...2; ribosome -- ( ribosomal RNA ) rift -- n. A long , narrow crack in the entire thickness of the Earth's crust, which is bounded by normal faults on either side and forms as the crust is pulled apart; v. To split the Earth's crust; rift zone- n. Full article >>> Ribosome s Small cel...

Ribosomal RNA

...2; ribosome -- ( ribosomal RNA ) rift -- n. A long , narrow crack in the entire thickness of the Earth's crust, which is bounded by normal faults on either side and forms as the crust is pulled apart; v. To split the Earth's crust; rift zone- n. Full article >>> Related Terms: Ribosom...

Reverse transcriptase

...rse transcriptase . Within their character istic long terminal repeats (LTRs), some retrotransposons encode retroviral-like proteins (e.g. Full article >>> While transcription was class ically thought to only occur from DNA to RNA , reverse transcriptase trans cribes RNA ...

Retrotransposon

...rse transcriptase . Within their character istic long terminal repeats (LTRs), some retrotransposon s encode retroviral-like proteins (e.g. Full article >>> Non-LTR retrotransposon s , or retroposons integrate at short, consensus-defined DNA targets in mammals in a process m...

Retrotransposons

...e >>> Within their character istic long terminal repeats (LTRs), some retrotransposons encode retroviral-like proteins (e.g., gag, pol) for reverse transcriptase and integrase. Full article >>> in retrovirus refers to this reversal of the Central dogma of mol...