Question

Origin of silk gland in silkworm is:

• A. Ectodermal
• B. Endodermal
• C. Mesodermal
• D. Epidermal

Hint:

Silkworm anatomy:
- Silk gland: Ectodermal origin.
- Modified salivary gland.
- Produces fibroin and sericin.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of silkworm anatomy and silk gland origin.

Step 2: Detailed Explanation:
The silk gland in silkworms (Bombyx mori) is of ectodermal origin.
It is a modified salivary gland.
It produces silk protein (fibroin) which is extruded as silk thread.
Endodermal (B): Origin of the midgut.
Mesodermal (C): Origin of muscles.
Epidermal (D): Origin of cuticle.
Thus, the silk gland is ectodermal.

Step 3: Final Answer:
Thus, the origin of the silk gland in silkworms is ectodermal, which corresponds to option (A).
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