Search Results for: principle
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
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
Biuret test
In this article we will answer the following three questions: What is a Biuret Test? What does biuret test for? What is... 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
Law of Segregation
Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that initially were... Read More
Independent Assortment
Independent Assortment Definition Independent assortment refers to the alleles or genes that sort into the newly formed... 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
Cell theory
What Is Cell Theory? Biological cell theory explains the idea of organismal constitution, structure, and function. It... Read More
Biogenesis
Biogenesis Definition Biogenesis refers to the idea or the process whereby a living thing comes from another living thing,... Read More
Hardy-Weinberg equilibrium
Definition noun A principle stating that both allele and genotype frequencies in a randomly-mating population remain... Read More
Sexual selection
What is Sexual Selection? The definition of sexual selection is very interesting in biological terms. The sexual selection... Read More
Hardy-Weinberg law
Definition noun A principle stating that both allele and genotype frequencies in a randomly-mating population remain... Read More
Filtration
Filtration Definition What is filtration? Filtration is separating a solid from a fluid through a porous material that... 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
Complete dominance
Complete Dominance Definition Genetics is the study of how traits are inherited by organisms and in what ways these... 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
Spontaneous generation
Definition noun plural: spontaneous generations The previously popular notion that living organisms arise or develop from... Read More
Osmotic pressure
Osmotic Pressure Definition Osmotic pressure is the pressure caused by a difference in the amounts of solutes (or... 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
Agglutination
Agglutination Definition What does agglutination mean? It generally refers to the process of sticking together or the... 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
Gram-positive cocci
Definition noun, singular: gram-positive coccus A group of spherical bacteria that retains the violet stain following gram... Read More
Gametokinetic hormone
Gametokinetic hormone --> follitropin An acidic glycoprotein hormone of the anterior pituitary that stimulates the... 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
Sugar Homeostasis
Blood Sugar Regulation As described in Cell Biology tutorials, the body requires volumes of glucose in order to create ATP.... 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
Conservation of energy
Conservation of energy The principle that the total amount of energy in a closed system remains always the same, none being... 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
Denaturation
Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... Read More
Darwinian fitness
Darwinian Fitness Definition Darwinian fitness refers to the measure of an individual organism's or genotype's reproductive... 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