Evolution_Zoology

• Evolution as such - This is the theory that the world is not constant nor recently created nor perpetually cycling but rather is steadily changing and that organisms are transformed in time.
• Common Descent - theory that every group of organisms descended from a common ancestor ,and that all groups of organisms, including animals, plants, and microorganisms, ultimately go back to a 'Single origin of life on earth.
• Multiplication of Species - This theory explains the origin of the enormous organic diversity. It postulates that species multiply, either by splitting into daughter species or by ''budding,'' that is by the establishment of , geographically isolated founder populations that evolve into new species.
• Gradualism - According to this theory, evolutionary change takes place through the gradual change of populations and not by the sudden (saltaional) production of new individual's that represent a new type.
• Natural Selection - evolutionary change, comes about through the abundant production of genetic variation in every generation. The relatively few individuals who survive, owing to a particularly well-adapted combination of inheritable characters, give rise to the next generation.
• Adaptation - A characteristic of an organism that makes it better suited than other members of its population to survive and reproduce under particular environmental conditions.