Examlex
A molecule with two resonance structures is shifting quickly back and forth from one structure to the other.
Metamorphosis
A profound change in form from one stage to the next in the life history of an organism, as from caterpillar to butterfly.
Larva
The immature, wingless, and often worm-like stage in the life cycle of insects, before they transform into adults.
Pupa
A transitional stage of a developing insect, after larva and before adulthood, during which it undergoes transformation.
Cocoon
A protective casing spun by the larvae of many insects, inside which they undergo metamorphosis into their adult form.
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