Consider the model for the equilibrium number of species in a mainland (continental) region, as illustrated in Figure 20.23. What does this model say about the rate of speciation?
A) The rate of speciation decreases as a linear function of the number of species.
B) The rate of speciation increases as a linear function of the number of species.
C) The rate of speciation increases as a function of the number of species, but the rate of increase decelerates as the number of species becomes large.
Ans: C) The rate of speciation increases as a function of the number of species, but the rate of increase decelerates as the number of species becomes large.
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