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Butterfly How does a caterpillar become a butterfly?

Understand imaginal discs, pupal reorganization, and what survives a caterpillar's transformation into a butterfly.

lessons

~20 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

A caterpillar and butterfly are one life cycleDescribe the four stages of complete metamorphosis and the different jobs of larva and adult.Egg, caterpillar, chrysalis, and adult are specialized stages in one repeating life cycle.
Imaginal discs keep the adult plan aliveExplain how protected imaginal tissues preserve and pattern the adult body plan.Adult structures begin as patterned tissues that grow while the larva feeds and develop during pupation.
The chrysalis is an active construction siteTrace selective tissue breakdown, persistence, remodeling, and pattern formation inside the pupa.The chrysalis protects an active rebuild in which larval and adult tissues have different fates.
Emergence turns a rebuilt body into a flying oneExplain how emergence, hemolymph pressure, scales, and adult organs create a functional butterfly.The new adult expands its wings, hardens them, and begins a lifestyle built around flight, sensing, feeding, and reproduction.
What survives the change?Distinguish continuity of the individual from replacement and remodeling of body tissues.The same genome and selected cellular histories persist through a selective, coordinated reorganization.

Questions this course answers

Which stage is specialized mainly for eating and growing?

The larval caterpillar uses chewing mouthparts and repeated feeding to build reserves for metamorphosis.

Match each stage to its main role.

Complete metamorphosis separates embryonic, feeding, rebuilding, and reproductive jobs.

What are imaginal discs or primordia?

Imaginal tissues are protected developmental sources for adult structures such as wings, legs, and eyes.

Why can a caterpillar carry an adult plan without having adult wings?

The adult plan exists in developmental tissues, not as finished external wings.

Put these events in a useful order.

Feeding supplies resources, hormones begin pupation, the chrysalis protects the pupa, and adult tissues are then rebuilt inside it.

Which statement best describes larval tissues during pupation?

Metamorphosis is selective reorganization rather than total destruction or complete preservation.

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