Question

The silk fiber is obtained from

• A. fleece of sheep
• B. cotton ball
• C. cocoon
• D. shiny jute stalk

Answer 1

The correct option is C

cocoon

The correct option is C.

Explanation of the correct option:

1. The life cycle of silk moths is divided into eggs, caterpillars/silkworms, cocoons and adult moths.
2. The cocoon stage is formed by the spinning of a protective layer (silk) around the silkworm which is secreted by the silkworm.
3. Silk fibers are obtained from the cocoon by exposing the cocoon to the sun or by putting it in boiling water.
4. Then the silk fiber is spun into threads.

Explanation of the incorrect options:

Option A:

1. Sheep are farm-grown domesticated animals reared for their wool, milk, and meat.
2. Fleece is a sheep's wool coat.
3. Sheep can be sheared or shaved for wool when they reach a certain age.

Option B:

1. Cotton is obtained from the cotton plant.
2. Cotton balls fall off the plant as they develop, and cotton fibres may be seen.
3. Cotton is hand-picked. The fibers are then removed from the seeds by combing.

Option D:

1. Jute fiber is extracted from the jute plant's stem.
2. The fiber is removed from the stem of the jute plant using the retting process.

Final answer: The silk fiber is obtained from cocoon.