Isolation that prevents zygote formation is called:
Prezygotic isolation reflects key principle in quiz on speciation+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Prezygotic isolation aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Prezygotic isolation fits helps integrate natural selection, environment.
Ref: Coyne & Orr, Speciation, Chapter 1: Species Concepts and Isolation.