Butterfly life cycle — arrange metamorphosis stages from egg to adult: (a) Butterfly (b) Cocoon (c) Egg (d) Worm (caterpillar)
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Aa, d, c, b
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Ba, c, d, b
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Cb, d, a, c
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Dc, d, b, a
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Ec, b, d, a
Answer
Correct Answer: c, d, b, a
Explanation
Introduction / Context:This question concerns complete metamorphosis in butterflies and moths. The sequence begins with the egg and ends with the adult butterfly, with larval and pupal stages in between.
Given Data / Assumptions:
- Stages: Egg → Worm (caterpillar/larva) → Cocoon (pupa/chrysalis) → Butterfly (adult).
- We adopt common classroom terminology where “worm” stands for “caterpillar.”
Concept / Approach:Butterflies undergo holometabolism: distinct egg, larva, pupa, and adult phases. The caterpillar feeds and grows; the pupa is a transformative stage; the adult emerges to reproduce.
Step-by-Step Solution:1) Egg (c) — laid on host plants.2) Worm/caterpillar (d) — feeding and growth stage.3) Cocoon/chrysalis (b) — metamorphic transformation.4) Butterfly (a) — reproductive adult.
Verification / Alternative check:Standard biology diagrams match this order exactly.
Why Other Options Are Wrong:
- Any option starting with adult or cocoon is out of order.
- Sequences that place egg later violate the life-cycle start.
Common Pitfalls:Confusing cocoon (covering) with chrysalis; in many butterflies the pupal case itself is the chrysalis. The educational order remains unchanged.
Final Answer:c, d, b, a