2. Silk is secreted by two
the head of the silkworm.
(a) salivary glands (b) thoracic glands
(c) pituitary gland (d) glands
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Answer:
The silk is a continuous filament comprising fibroin protein, secreted from two salivary glands in the head of each worm, and a gum called sericin, which cements the filaments. The sericin is removed by placing the cocoons in hot water, which frees the silk filaments and readies them for reeling.
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Explanation:
silk is secreted by salivary glands of silkworm
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