Arrange the stages of a moth’s life cycle in the correct chronological order from the very beginning to the adult form. (i) Pupa (ii) Larva (caterpillar) (iii) Moth (adult) (iv) Eggs
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A(iv), (iii), (ii), (i)
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B(iv), (iii), (i), (ii)
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C(iv), (ii), (i), (iii)
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D(iv), (i), (ii), (iii)
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E(ii), (iv), (i), (iii)
Answer
Correct Answer: (iv), (ii), (i), (iii)
Explanation
Introduction / Context:Life-cycle ordering questions test conceptual knowledge of biological development. In insects with complete metamorphosis, the sequence proceeds through distinct morphological stages ending in the reproductive adult.
Given Data / Assumptions:
- The organism is a moth exhibiting complete metamorphosis.
- Stages provided: Eggs, Larva (caterpillar), Pupa (chrysalis-like stage), Adult moth.
- No stage is skipped and each stage happens once in this simple model.
Concept / Approach:Complete metamorphosis follows the canonical order: egg → larva → pupa → adult. Each stage has characteristic functions: eggs for embryonic development, larva for feeding/growth, pupa for transformation, adult for reproduction and dispersal.
Step-by-Step Solution:Start with (iv) Eggs: oviposition precedes hatching.Next, (ii) Larva: feeding and growth occur.Then, (i) Pupa: metamorphic reorganization.Finally, (iii) Moth (adult): emerges with wings and reproductive capability.
Verification / Alternative check:The adult must be last because it is the reproductive dispersal form. Any sequence that places adult before pupation contradicts metamorphosis.
Why Other Options Are Wrong:Options beginning with larva/pupa omit oviposition; options placing adult before pupa invert the transformation steps; mixing egg late breaks causality.
Common Pitfalls:Confusing incomplete metamorphosis (egg → nymph → adult) with complete metamorphosis (egg → larva → pupa → adult).
Final Answer:(iv), (ii), (i), (iii)