Inbreeding causes mutations. Genetic drift is the change in gene frequencies due to chance. Instantaneous speciation can be caused by polyploidy. Panspermia refers to completely random mating. Species boundaries are not violated by natural reproductive mechanisms of organisms on Earth.
Parapatric speciation is speciation set in motion by the founder effect.
Sibling species are reproductively isolated species that do not appear identical. Note that more than one answer can be correct. Circle all correct answers . A. fitness is heritable B. mutation C. differential fitness D. phenotypic variation E. reproductive isolation 2. A. a book written by Carl Linnaeus B. a concept developed by Plato C. a paper written by Stanley Miller D. a concept developed by Aristotle E. a book edited by Alfred Russel Wallace 3.