A mule is infertile. This is an example of

  1. hybrid sterility as an isolating mechanism
  2. genetic drift
  3. founder effect
  4. allopatric speciation
Answer

A) hybrid sterility as an isolating mechanism

Hybrids cannot reproduce. AS & A Level Biology · Topic 17 Selection and Evolution · 17.3 Evolution

Biology MCQ · More A Level Biology: Selection and evolution MCQs · Practise