163 results found

Search Results for: scale

Large-scale mutation

Definition noun, plural: large-scale mutations (genetics) A type of mutation several nucleotides of a gene within a large... Read More

Small-scale mutation

Definition noun, plural: small-scale mutations (genetics) A type of mutation characterized by a change of one or few... Read More

Hardness scale

Hardness scale a qualitative scale in which minerals are classified in order of their increasing hardness, based on the fact... Read More

Udden-wentworth scale

Udden-Wentworth scale (Science: plant biology) A geometric scale of grain sizes which classifies particles of siliciclastic... Read More

PH scale

'''pH scale (chemistry) A scale ranging from 0 to 14 ph units, reflecting the concentration of hydrogen ions in solution. A... Read More

Gaffky scale

Gaffky scale --> gaffky table a numerical rating for the classification of tuberculosis according to the number of tubercle... Read More

Mutation

Mutation is a permanent, heritable change in the nucleotide sequence or the process by which such a change occurs in a gene... Read More

Scale

Scale A reduced or rudimentary leaf, for example surrounding a dormant bud, a thin flap of tissue, for example on the... Read More

PH Scale

(chemistry) p(otential of) H(ydrogen); the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per... Read More

Deletion mutation

Definition noun, plural: deletion mutations (genetics) A type of mutation wherein one or few nucleotide base pairs are... Read More

Hydrophilic

Hydrophilic Definition What does a hydrophile (or hydrophilic molecule) mean? If a molecule is “water-loving”, it is... Read More

Nucleotide deletion

Definition noun A deletion of a single nucleotide causing a shift in the reading frame of the codons in the mRNA, thus, may... Read More

Scales

scale A reduced or rudimentary leaf, for example surrounding a dormant bud, a thin flap of tissue, for example on the... Read More

Substitution mutation

Definition noun, plural: substitution mutations (genetics) A small-scale mutation characterized by a substitution of one or... Read More

Point mutation

Definition noun, plural: point mutations (genetics) A small-scale mutation characterized by a change of only one nucleotide... Read More

Gene

A gene is the fundamental, physical, and functional unit of heredity. The genes make up the sequences of DNA (genotypes).... Read More

Transversion

Definition noun, plural: transversions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Insertion (genetics)

In genetics, insertion refers to the type of mutation characterized by the insertion of one or few nucleotide base pairs to... Read More

Diatonic

Diatonic Pertaining to the scale of eight tones, the eighth of which is the octave of the first. Diatonic scale, a scale... Read More

Transition

Definition noun, plural: transitions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Intervals

Interval scale like a temperature scale in centigrade or fahrenheit units, a scale on which the intervals are equal but... Read More

Orange

orange 1. (Science: botany) The fruit of a tree of the genus citrus (Citrus Aurantium). It is usually round, and consists of... Read More

Kelvin

Kelvin (Science: unit) a temperature scale where zero degrees corresponds to absolute zero (no thermal energy), degrees have... Read More

Chromosomal inversion

Definition noun, plural: chromosomal inversions A chromosomal aberration wherein a segment of a chromosome is reversed... Read More

Melanin

Definition noun A group of insoluble pigments found in melanophores and produced from the oxidation of tyrosine, followed by... Read More

Biodiversity

Biodiversity Lead Author: J. Emmett DuffyThis article has been reviewed and approved by the following Topic Editor: John... Read More

Integumentary system

Definition noun The organ system consisting of the skin and associated structures such as the glands, hair, nails, scales,... Read More

Rhizome

The rhizome is derived from the Greek word rhizoma, meaning "a bunch of roots". Usually, rhizomes are confused with roots;... Read More

New Zealand’s Unique Fauna

By: Maria Victoria Gonzaga In the previous lesson, we learned about the high biodiversity of New Zealand and how... Read More

Inheritance and Probability

Reviewed by: Mary Anne Clark, Ph.D. Gregor Mendel, an Austrian monk, is most famous in this field for his study... Read More

The consequences of antibiotic use in horticulture

Leading articles Frederick R. Falkiner* Department of Clinical Microbiology, Trinity College, Dublin; Central Pathology... Read More

Atomic mass

Atomic mass (Science: chemistry, physics) The mass of an atom relative to other atoms. The present-day basis of the scale of... Read More

Diminish

Diminish 1. To make smaller in any manner; to reduce in bulk or amount; to lessen; opposed to augment or increase. Not... Read More

Macroevolution

Definition noun, plural: macroevolutions Evolution happening on a large scale, e.g. at or above the level of a species, over... Read More

Environment

Environment Definition What does environment mean? If you mean physical environment, then it is defined as the surrounding... Read More

Phytoremediation – A Green Solution to Pollution

Plants may be the raw material of the future for everything from fibers to fuels, but in the meantime they're busy mending... Read More

Micrometer

micrometer An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of... Read More

Track

track To follow the tracks or traces of; to pursue by following the marks of the feet; to trace; to trail; as, to track a... Read More

Albino

Definition noun, plural: albaninos An organism with albinism, which is a condition characterized mainly by a lack of or an... Read More

Scallop

scallop 1. (Science: zoology) Any one of numerous species of marine bivalve mollusks of the genus pecten and allied genera... Read More