What is the appearance of a German cockroach nymph after molting?

After a German cockroach nymph molts, its appearance is initially ivory white. This condition occurs because the exoskeleton is soft and not yet hardened, making the nymph vulnerable for a few hours. During this time, the pale color reflects the lack of pigmentation in the newly formed exoskeleton. As the nymph's exoskeleton hardens, it gradually darkens to the typical brown color associated with mature German cockroaches. This process is an important aspect of their life cycle, as it allows them to grow and develop while ensuring they can effectively camouflage themselves after the hardening phase.

The other choices do not accurately describe the molting process. Nymphs do not remain light brown or turn dark immediately after molting, nor do they have a yellow appearance with spots. Instead, their transition through color serves a functional purpose in their maturity and survival.