INVERTEBRATES

1. Which types of silkworms do we cultivate in Nepal?
- The types of silkworm that we cultivate in Nepal are:
a. Seri silkworm (Bombyx mori)- It feeds upon Mulberry leaves.
b. Eri sikworm (Attacus ricini)- It feeds upon castor leaves. 

2. What is cocoon?
- A cocoon is the silky envelope rolled by the larvae of many insects such as silkworm.

3. What is the length of cocoon that can be extracted from a single cocoon?
-  The length of silk thread that can be extracted from a single cocoon is 1000 feet long.

4. In which stage of life cycle of silkworm, the silk is produced?
- Silk is produced in the cocoon stage of the life cycle of silk worm.