| A | B |
|---|
| Prezygotic Barrier | ioslation occurs before zygote created |
| Postzygotic Barrier | isolation occurs after zygote created |
| Biological Species Concept | species defined as group that can produce viable offspring |
| Type of barrier displayed by mule | Reduced hybrid fertility |
| Morphological Species Concept | species defined by similar physical characteristics |
| Ecological Species Concept | specied defined by similar ecological niche |
| Phylogentic Species Concept | species defined by shared ancestor |
| Allopatric Speciation | species develop due to geographic separation |
| Symaptric speciation | species develops due to behavioral change/habits |
| Endosymbiont theory | eukaryotic cells developed through symbiotic relationship |
| Heterochrony | changes in timing of development |
| Homeotic Genes | genes responsible for spatial placement of body parts |
