When there is no physical barrier, a new species arises within the home range on an existing species.
no
Allopatric and sympatric speciation are both methods by which new species arise. However, allopatric speciation is when species interbreed. Sympatric speciation is when several new species arise from a common ancestor.
sympatric , allopatric and parapatric speciation
behavioral isolation
Sympatric Speciation
sympatric speciaton
sympatric speciation. This occurs when two subpopulations of a species evolve into distinct species without geographical isolation, often due to factors such as disruptive selection or polyploidy.
They both are mechanisms by which new species arise
Sympatric speciation refers to the formation of two or more descendant species from a single ancestral species all occupying the same geographic location. Often cited examples of sympatric speciation are found in insects that become dependent on different host plants in the same area.
Sympatric Speciation
characteristics of organisms that have been altered by the selective pressure of competition; the tendency for enhanced character divergence in the sympatric populations of two species that are partly sympatric and partly allopatric in their distributions, owing to the selective forces of competition.
Sympatric Speciation develops within the range of the parent population. This type of speciation does not include geographical isolation, and can occur rapidly if a genetic change results in a barrier between the mutants and the parent population.