How do German cockroach nymphs aid in the lifecycle of the species?

German cockroach nymphs play a crucial role in the lifecycle of their species by exerting pressure to split the ootheca, which is the egg case where the embryos develop. The ootheca of German cockroaches is typically carried by the female cockroach until the nymphs are ready to emerge. By applying pressure on the ootheca, nymphs facilitate their own exit from the protective casing, allowing them to hatch and begin their independent lives.

This behavior enhances the survival of the species as it ensures that the nymphs can emerge in a coordinated manner when the environmental conditions are favorable, increasing their chances of survival from predation and environmental hazards. While other options may relate to different ecological behaviors or adaptations, they do not directly pertain to the critical role nymphs play in the emergence and continuation of the species' lifecycle.