Search Results for: replacement
Replacement bone
replacement bone --> endochondral bone A bone that develops in a cartilage environment after the latter is partially or... Read More
Replacement model
Definition noun A theory proposed by Christopher Stringer and Peter Andrews suggesting that the place of origin of modern... Read More
Replacement
replacement 1. The act of replacing. 2. (Science: chemistry) The removal of an edge or an angle by one or more... Read More
Mitochondrion
Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More
Saline solution
Saline Solution Definition Saline solution is one the most medically-used solution, which contains sodium chloride... Read More
Semilunar valve
The human heart structure consists of heart chambers (2 atria and 2 ventricles) that differ functionally from each other.... Read More
Demographic transition
The demographic transition model is a theoretical framework that explains the historical shift in population dynamics as a... Read More
Intercalary meristem
The basic structural framework of plants is composed of different types of tissues. Based upon the capacity to divide, the... Read More
Recent single-origin hypothesis
Definition noun The hypothesis that modern humans came from or evolved from a single origin (i.e. in Africa) and then these... Read More
Silent mutation
A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More
Voluntary dehydration
voluntary dehydration That physiologic lag or deficit that results when sensations of thirst are not strong enough to bring... Read More
Missense mutation
What is a missense mutation? Literally speaking, a mutation that changes the meaning of the encoded gene sequence is the... Read More
Redox reaction
Redox Reaction Definition What are redox reactions? This is a common term in chemistry and biology. In chemistry, a redox... Read More
Polymorphism
Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More
Genetic diversity
Genetic Diversity Definition Each species is composed of individuals with their own set of genes. A gene is the inheritance... Read More
Deoxyribonucleic acid
Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... Read More
Base pair substitution
Definition noun, plural: base pair substitutions A type of mutation involving replacement or substitution of a single... Read More
Transversion
Definition noun, plural: transversions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More
Sugar-phosphate backbone
Definition noun A structural component of DNA that consists of 5-deoxyribose sugars and phosphate groups involved in... Read More
Mitochondrial DNA
Mitochondrial DNA Definition noun plural: mitochondrial DNAs The genetic material in the mitochondrion that carries code... Read More
Substitution
substitution 1. The act of putting one thing in the place of another, especially the chemical replacement of one element or... Read More
Nucleosome
Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More
Cellular respiration
Cellular Respiration Definition What is cellular respiration in simple terms? Cellular respiration can be defined simply as... Read More
Diaphoresis
What is Diaphoresis? Diaphoresis is referred to excessive or profuse perspiration or sweating which may be due to... Read More
Sos repair
SOS repair A system that repairs severely damaged bases in dNA by base excision and replacement, even if there is no... Read More
Pulse-chase experiment
pulse-chase experiment An experiment in which an enzyme, a metabolic pathway, a culture of cells, etc., interacts with a... Read More
Hydroxylation
Hydroxylation Hydroxylate, to introduce hydroxyl into (a compound or radical) usually by replacement of... Read More
Frameshift mutation
Define Frameshift Mutation What is a frameshift mutation? In biology, insertions or deletions of nucleotides in the coding... Read More
Terminal hair
Definition noun The mature type of hair characterized by being pigmented, thicker, and with a larger diameter than the... Read More
Transition mutation
transition mutation A point mutation involving substitution of one base-pair for another, i.e., replacement of one purine... Read More