Which metamorphosis group shows no drastic change in form from juvenile to adult?

The metamorphosis group characterized by no drastic change in form from juvenile to adult is referred to as 'simple' metamorphosis. In this type of metamorphosis, the life cycle typically includes three stages: the egg, the nymph, and the adult. The nymph resembles a smaller version of the adult, differing mainly in size and developmental stage rather than in significant anatomical features.

For instance, insects like grasshoppers and cockroaches undergo simple metamorphosis. Their nymphs look somewhat similar to the adults and gradually develop into their mature form without undergoing a distinct, transformative change. This contrasts with gradual and complete metamorphosis, where more pronounced changes, such as the formation of a pupa, occur, leading to a significantly different adult form.

By understanding this, it becomes clear why simple metamorphosis stands apart as the group that reflects minimal changes during the transition from juvenile to adult.