Search Results for: speciation
Allopatric speciation
We can define speciation as a process by which the novel genetically independent group of organisms are formed through the... Read More
Sympatric speciation
Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More
Peripatric speciation
Definition noun A speciation in which new species evolve in a sub-population that colonized a new habitat or niche within... Read More
Parapatric speciation
Definition noun A speciation in which the zones of two diverging populations are only partially separated that the species... Read More
Speciation
Definition noun, plural: speciations The process in which new genetically distinct species evolve usually as a result of... Read More
Disruptive Selection
An evolutionary process known as disruptive selection (or disruptive natural selection) causes a population to become... Read More
Speciation event
Definition noun, plural: speciation events A moment in which the evolutional lineage splits, starting history of a new... Read More
Divergent evolution
Divergent Evolution Definition Divergent evolution refers to the process by which interbreeding species diverged into two... Read More
Vicariant speciation
Definition noun Formation of new species due to vicariance. Supplement New species are formed from the division of original... Read More
A Look Into Natural Selection and its Mechanisms
Charles Darwin is credited with outlining the fundamentals of evolution. He was a smart and eager pupil and protégé, and... Read More
The Gene Pool and Population Genetics
Reviewed by: Mary Anne Clark, Ph.D.The previous tutorial is about adaptive radiation. Adaptive radiation is... Read More
Classification system
Classification Systems Definition In life, many things are classified, that is, to put into categories or groups based on... Read More
Genetic variability
Genetic Variability Definition Genetic variability refers to the tendency of individual genetic characteristics in a... Read More
Genetic isolation
Definition noun The lack of interbreeding or little genetic mixing between organisms of the same... Read More
Early Mammals on Earth
By the time the dinosaurs were extinct 65 million years ago, the world's landmass had split up into more or less the... Read More
SENI Biometric Analysis on the extinct Scincidae species: Macroscincus coctei (underlined)
Brian L. Schnirel Leeway Corucia Research Center (LCRC) Courtesy: Polyphemos (2004) Introduction: It has been... Read More
Population Growth and Survivorship
By: Maria Victoria GonzagaPreviously, we learned about biodiversity and endemism. Now, let's look at the... Read More
Genetic isolate
Definition noun, plural: genetic isolates A population of organisms that has minimal genetic mixing due to geographical... Read More
Imprinting
What does imprinting mean? Have you watched the TV cartoon show “Tom and Jerry” with an episode of a duck and its... Read More
Allotetraploid
Allotetraploid Definition An allotetraploid is an organism with four sets of chromosomes (4n). This is in contrast to the... Read More
Lights’ Effect on Growth
Plants are the primary producers of energy in any ecosystem, meaning that they bring in new energy to it which supports... Read More
Autopolyploidy
Definition noun (genetics) A type of euploidy wherein the additional set of chromosomes is derived from a parent or... Read More
Punctuated equilibrium
Definition noun A theory that describes an evolutionary change happening rapidly and in brief geological events in between... Read More
Evolutionary biology
Definition noun The branch of biology concerned with the evolution of organisms, particularly the origin and descent of... Read More
Biodiversity
Biodiversity Lead Author: J. Emmett DuffyThis article has been reviewed and approved by the following Topic Editor: John... Read More
Commensalism
Commensalism Definition What is commensalism? Literally, commensalism is a Latin word that means ‘to eat at the same... Read More
Sexual selection
What is Sexual Selection? The definition of sexual selection is very interesting in biological terms. The sexual selection... Read More
Vicariance
Definition noun, plural: vicariances (biology) The separation of a large group of organisms from the population due to a... 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
Adaptive Radiation
Reviewed by: Mary Anne Clark, Ph.D.When Charles Darwin was in the Galapagos Islands, one of the first things he... Read More