What are the two main types of metamorphosis in insects?

• A. Simple and gradual metamorphosis
• B. Complete metamorphosis and Simple metamorphosis
• C. Direct metamorphosis and Indirect metamorphosis
• D. Hydrometamorphosis and Anamorphosis

Answer: (B)

Insects develop through two broad metamorphosis patterns: complete metamorphosis (holometabolism) and simple, or incomplete, metamorphosis (hemimetabolism).

With complete metamorphosis there are four life stages—egg, larva, pupa, and adult. Larvae look very different from adults and usually have different habits and food, with a pupal stage where the body is reorganized into the adult form. This pattern is typical of beetles, bees, wasps, butterflies, and moths.

With simple metamorphosis there are three life stages—egg, nymph, and adult. The nymphs resemble small adults and progressively molt to reach full size, generally sharing the same habitat and food as adults. This pattern is common in grasshoppers, many true bugs, and cockroaches.

So the two main types are complete metamorphosis and simple (incomplete) metamorphosis. Other terms like direct/indirect or hydrometamorphosis/ anamorphosis aren’t standard classifications for insect development.