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Q39 - Factors That Speed Up or Slow Down Speciation

Theoretical A Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license
Speciation & Reproductive Isolation

Speciation rates are variable in different lineages of organisms. Some lineages have many species; others have only a few.

Using the information and data, determine which of the statements are true or which are false.

A. The larger the number of species in some lineages, the larger number of opportunities for new species to form.
B. Animal-pollinated plant families have, on average, more species than closely related families pollinated by wind.
C. Animals with complex mating behavior are likely to form new species at a low rate.
D. Oscillations of climates may increase the speciation rate.
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Question reproduced from IBO 2016, Theoretical Paper A, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)