III. Islands as "natural laboratories" for exploring speciation We all know how much of an influence the juxtaposition of variation and similarity among islands in the Galapagos archipelago played in ...

Often this type of speciation occurs in three steps ... so that even if some variation occurs, it is limited by this "gene flow." But gene flow is interrupted if the population becomes divided ...

Habitat variation may also contribute to local adaptation ... which is a necessary precursor to speciation. Future studies that incorporate ecological, behavioral, and genetic data hold great ...

The role of sexual selection in speciation. A view that is becoming increasingly popular is that sexual selection, or selection related to variation in reproductive success, plays a role in ...

Many factors can cause populations to diverge genetically (e.g., genetic drift, natural selection, sexual selection). Understanding the relative roles of these factors in generating contemporary ...

Try these interactive flashcards based on GCSE biology past papers. By working your way through the flashcards created by experts, you can prepare for your biology exams and make your revision ...