Question

Il caterpillars spin their cocoons
at which stage?
a lupa stage b harval stage a Both
aandb
d None of these​

Answer 1

Answer:

a lupa stage b harval stage a Both

aandb

Explanation:

Answer 2

Answer:

Pupa

Explanation:

Actually, silkworms are not worms, but the larvae or caterpillars hatched from the eggs of the silk moth. The life history of a silk moth starts when a female silk moth lays eggs. The larvae or caterpillars hatch from the eggs of the silk moth. These silkworms feed on fresh mulberry leaves the silkworm grows in size and then becomes a pupa. In the pupa stage, it weaves a net to hold itself.  It then swings its head from side to side, secreting a fibre that hardens on contact with air. This fibre is made of a protein and becomes the silk fibre.

Therefore, the correct answer is Pupa