72 results found

Search Results for: principle

Principle

Principle 1. Beginning; commencement. Doubting sad end of principle unsound. (Spenser) 2. A source, or origin; that from... Read More

Hardy-Weinberg principle

Definition noun A principle stating that both allele and genotype frequencies in a randomly-mating population remain... Read More

Active principle

Active principle a constituent of a drug, usually an alkaloid or glycoside, upon the presence of which the characteristic... Read More

Iodine test

Iodine Test Definition The iodine test is a chemical reaction-based identification test for starch. In this test, iodine... Read More

Limiting factor

Limiting Factor Definition A limiting factor refers to any of the factors (variables) in an environment capable of limiting... Read More

Natural selection

Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More

Law of Segregation

Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that were initially... Read More

Independent Assortment

Independent Assortment Definition Independent assortment refers to the genes or alleles that sort into the newly formed... Read More

Ion

We have been introduced to ions in varied fields of Science like Physics, Chemistry, and Biology. This article takes you on... Read More

Mendel’s laws: definitions

Genetics - a branch of biology that deals with the study of heredity and variations Variations - differences amongst the... Read More

Hardy-Weinberg equilibrium

Definition noun A principle stating that both allele and genotype frequencies in a randomly-mating population remain... Read More

Hardy-Weinberg law

Definition noun A principle stating that both allele and genotype frequencies in a randomly-mating population remain... Read More

Doctrine

Doctrine 1. Teaching; instruction. He taught them many things by parables, and said unto them in his doctrine, Hearken.... Read More

Biogenesis

Biogenesis Definition Biogenesis refers to the idea or the process whereby a living thing comes from another living thing,... Read More

Complete dominance

Complete Dominance Definition Genetics is the study of how traits are inherited by organisms and in what ways these... Read More

Bell-Magendie law

Definition noun The principle referring to the separation of sensory and motor neurons of the spinal cord, where the... Read More

Spontaneous generation

Definition noun plural: spontaneous generations The previously popular notion that living organisms arise or develop from... Read More

Base-pairing rule

Base-pairing Rules Definition The base-pairing rules are rules that apply during the pairing between one purine and one... Read More

Rudiments

rudiment 1. That which is unformed or undeveloped; the principle which lies at the bottom of any development; an unfinished... Read More

Agglutination

Agglutination Definition What does agglutination mean? It generally refers to the process of sticking together or the... Read More

Osmotic pressure

Osmotic Pressure Definition Osmotic pressure is the pressure caused by a difference in the amounts of solutes (or... Read More

Realized niche

What is a niche? A niche can be defined as the means by which a species or an individual interacts with its environment. In... Read More

Filtration

Filtration Definition What is filtration? Filtration is separating a solid from a fluid through a porous material that... Read More

Denaturation

Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... Read More

Decomposer

Decomposer Definition The organisms that carry out the process of decay or breakdown of the dead organism are known as... Read More

At Home in the Universe: The Search for the Laws of Self-Organization and Complexity

At Home in the Universe: The Search for the Laws of Self-Organization and Complexity  ... Read More

Pseudoscience

Definition noun Any body of knowledge, methodology, belief, or practice purported to be scientific but which fails to comply... Read More

Milieu interieur

Definition noun (1) Literally means: the environment within. (2) The outside of the cells inside the body of an organism,... Read More

Genetic equilibrium

Definition noun A condition where a gene pool is not changing in frequency because the evolutionary forces acting upon the... Read More

Interspecific competition

Interspecific Competition Definition In Biology, competition is defined as the process that occurs among species that have... Read More

Genotypic ratio

Genotypic Ratio Definition To understand 'Genotypic ratio', let us first understand the terms: 'Genotype' and 'Phenotype'.... Read More

Simple diffusion

Diffusion is essential in the anatomy and physiology of a living thing, especially with regard to homeostasis. It is one of... Read More

Base

Definition noun, plural: bases (1) (molecular biology) The nucleobase of a nucleotide involved in base pairing, as of a DNA... Read More

Apomorphy

Apomorphy Definition Apomorphy (biology definition): A derived trait or characteristic that identifies a species or a... Read More

Active agglutination

Definition noun An agglutination reaction in which the antigen is found naturally on particle Supplement Agglutination... Read More

Gram-positive cocci

Definition noun, singular: gram-positive coccus A group of spherical bacteria that retains the violet stain following gram... Read More

Y linkage

Definition noun, plural: Y linkages (genetics) A form of sex linkage involving particularly the Y chromosome Supplement Sex... Read More

Physiological Homeostasis

In animals such as ourselves, the internal environment of our bodies must have certain conditions within tolerable limits to... Read More

Sugar Homeostasis

Blood Sugar Regulation As described in Cell Biology tutorials, the body requires volumes of glucose in order to create ATP.... Read More

Mendel’s Law & Mendelian Genetics

Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial, Dominance, has described Gregor Mendel’s law of... Read More