Two populations of one plant species are separated by a mountain range. Occasionally, insects carry pollen from one population to the other population. What is the effect of this pollen transfer on speciation?
Speciation is faster, because new mutations are introduced into each population
Speciation is faster, because the two populations become more different from each other
Speciation is unaffected, because the two populations are still geographically apart
Speciation is slower, because alleles are shared between the two populations
40 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.