Original: Once toxins have been recruited into the venom proteome , they form large multigene families and evolve via the birth-and-death model of protein evolution , which leads to a diversification of toxins that allows the sit-and-wait predators the ability to attack a wide range of prey .
Simplified: Venom genes form large multigene families , and evolve by protein evolution . This leads to a diversification of toxins that let sit-and-wait predators attack a wide range of prey .