Final answer:
The number of anti-predator tactics in prey species supports the hypothesis that predation acts as a strong selective pressure on prey populations.
Step-by-step explanation:
The statement is true. The number of anti-predator tactics in prey species supports the hypothesis that predation is a strong selective pressure on prey populations.
One example of such tactics is Batesian mimicry, where a harmless species imitates the warning coloration of a harmful species to deter predation.
Another example is the increase in prey population density upon the removal of predators, indicating that prey density is predator-controlled.