The evolution of the animal immune system was probably driven by

Question

Quizplus · Accepted Answer

The selective pressures of parasitic and disease organisms are known to be a major driving force behind the evolution of the immune system in animals. As organisms have evolved defenses against parasites and pathogens, these parasites and pathogens have also evolved ways to evade or overcome those defenses, leading to a continuing arms race between hosts and their pathogens.

The Evolution of the Animal Immune System Was Probably Driven