True or False: Insect growth regulators attack a growth process found only in insects, making them generally harmless to humans and other vertebrates.

The statement is true because insect growth regulators (IGRs) are specifically designed to target hormonal processes that control the growth and development of insects. These processes, particularly involving juvenile hormone and ecdysteroids, are unique to insects and do not occur in mammals, including humans. As a result, IGRs are generally considered to be safe for humans and other vertebrates, as they do not interfere with the growth or metabolic processes of these organisms.

This selectivity is what makes IGRs effective as pest control agents, as they can disrupt the life cycle of insect pests without posing significant risks to non-target species. While it's crucial to note that any substance can be harmful at very high concentrations, the general understanding is that IGRs are designed to be specific and non-toxic to humans and animals at the concentrations typically used in pest management.