Question : At which stage in its life cycle does the silkworm yield the fiber of commercial use:
Option 1: Larva
Option 2: Egg
Option 3: Pupa
Option 4: Imago

Question

Question : At which stage in its life cycle does the silkworm yield the fiber of commercial use:

Option 1: Larva

Option 2: Egg

Option 3: Pupa

Option 4: Imago

Team Careers360 · Accepted Answer

Correct Answer: Pupa

Solution : The correct option is Pupa.

The silkworm goes through a spectacular change inside its cocoon during the pupal stage. When the larva comes into contact with air, it secretes a sticky material called sericin, which hardens and produces the protective cocoon. The silkworm metamorphoses inside the cocoon, converting into a pupa. The cocoon is made up of a continuous silk strand produced by the silkworm by rotating its body. Fibrin and sericin are two proteins that make up the silk strand. The bulk of silk fibre is made up of fibroin, which is the primary structural protein. The sericin helps to link the fibroin fibres together and protects the pupa.

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Question : At which stage in its life cycle does the silkworm yield the fiber of commercial use:
Option 1: Larva
Option 2: Egg
Option 3: Pupa
Option 4: Imago

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Popular Searches

Question : At which stage in its life cycle does the silkworm yield the fiber of commercial use:Option 1: LarvaOption 2: EggOption 3: PupaOption 4: Imago

Related Questions

Question : Which is the most popular coal for commercial use?Option 1: BituminousOption 2: AnthraciteOption 3: PeatOption 4: Lignite

Question : The number of eggs normally released during one menstrual cycle is :Option 1: 3Option 2: 2Option 3: 1Option 4: 4

Question : The first computer made available for commercial use wasOption 1: MANIACOption 2: ENIACOption 3: UNIVACOption 4: EDSAC

Question : Which of the following will yield a maximum discount on INR 7,500? 1. Two successive discounts of 5% and 5% 2. Single discount of 10% 3. Two successive discounts of 8% and 2%Option 1: 2Option 2: 1Option 3: All will yield the same discountOption 4: 3

Question : In how many years will Rs. 2,000 yield Rs. 662 as a compound interest at 10% per annum compounded annually?Option 1: 3Option 2: 2Option 3: 4Option 4: 5