In incomplete metamorphosis, how do nymphs differ from adults?

In incomplete metamorphosis, nymphs exhibit a developmental stage that closely resembles the adult form of the organism, which is why the statement that nymphs look very similar to adults is correct. This process, seen in insects like grasshoppers and cockroaches, involves a gradual series of molts where the nymphs become increasingly like the adults in appearance and behavior, though they typically lack fully developed wings and reproductive structures until they reach maturity.

The other options highlight misunderstandings about nymphs. Nymphs are not completely different species; they are actually the juvenile forms of the same species. Nymphs do not have more wings; instead, they usually have smaller, less developed wings that grow larger as they mature. Moreover, nymphs continue to feed actively during their growth stages, unlike the statement suggesting they do not feed at all. Understanding the similarities in appearance between nymphs and adults is crucial for grasping the concept of incomplete metamorphosis in certain insect life cycles.