At which stage in its life cycle, does the silkworm yield the fibre of commerce?
✓ Correct answer: b) Larva
ExplanationThe silkworm yields the fiber of commerce during its larval stage,specifically when it starts to spin its silk cocoon.The silkworm (the larval stage of the silk moth Bombyx mori) produces the fiber of commerce during its larval stage.This stage is when the silkworm starts spinning its silk to form a protective cocoon around itself.The silk produced by the larva is collected and used commercially to make silk fabric.Therefore, the correct stage when the silkworm yields the fibre of commerce is the larva.The imago is the adult moth stage in the silkworm’s life cycle.After metamorphosis, the adult moth does not produce silk.Its role is to mate and lay eggs, continuing the life cycle.Therefore, the silkworm does not yield silk during the imago stage.482
Practice more Science PYQs
Attempt a free 10-question quiz or browse the full Science & Technology previous-year-question bank with instant answers and explanations.
🔬 Science PYQs →