33 results found

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

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

Evolution

Evolution Definition Evolution is defined as a change in the genetic composition of a population over successive... 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,... Read More

Taxonomy

Taxonomy Definition The term "taxonomy" was developed from two Greek words, "taxis," meaning arrangement, and "nomia,"... 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

Species

Every living organism is unique when you observe its morphological, anatomical, molecular, genetic, biochemical, chemical,... 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

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

Genetic isolation

Definition noun The lack of interbreeding or little genetic mixing between organisms of the same... 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

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

Genetic isolate

Definition noun, plural: genetic isolates A population of organisms that has minimal genetic mixing due to geographical... Read More

Population Growth and Survivorship

By: Maria Victoria Gonzaga Previously, we learned about biodiversity and endemism. Now, let's look at the... Read More

Allopatry

Definition noun The occurrence of population of related organisms in separate, non-overlapping geographic areas such that... Read More

Biodiversity

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

Orthology

Science (genetics, molecular biology, genomics) genes or gene products that are homologous (descended from a common... Read More

Commensalism

Commensalism Definition What is commensalism? Literally, commensalism is a Latin word that means ‘to eat at the same... Read More

Evolutionary biology

Definition noun The branch of biology concerned with the evolution of organisms, particularly the origin and descent of... Read More

Punctuated equilibrium

Definition noun A theory that describes an evolutionary change happening rapidly and in brief geological events in between... Read More

Autopolyploidy

Definition noun (genetics) A type of euploidy wherein the additional set of chromosomes is derived from a parent or... Read More

Endemic

Global biodiversity is under threat and the rate at which species are getting endangered and extinct is alarming. If you... 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

Life

Life Definition Life is a characteristic of a living organism that distinguishes the latter from a dead organism or a... 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