Question

which of the following is not a fossil fuel product. a.coal. b.petrol. c. silk. d.kerosene​

Answer 1

Answer:

The correct answer is (c) Silk.

Silk is not a fossil fuel product but it is produced from the cocoons of the larvae of silkworms.

Fossil fuels are natural primary sources of energy which are none renewable and once depleted takes millions of years to get replenished. Examples of such fuels are coal, natural gas, petroleum and many more.

Answer 2

Silk is not a fossil fuel product.

Explanation:

• Silkworms are caterpillars of (usually) the Bombyx mori moth.  
• Throughout its 3 to 8 day pupating period, the silkworm secretes fibroin, a gummy liquid protein, from its two sericteries (special salivary glands).  
• Strapped over a spinneret (opening on the mouth), the twin pair of continuous filaments stabilize when they come into connection with the air.
• Next, the silkworm secretes sericin, a connection agent, from two additional glands to hold the two filaments composed.  
• While constructing its cocoon, the silkworm will twist in a figure-8 motion about 300,000 times and produce around 1 kilometer of filament.

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