Question

Which is the first stage of the life cycle of silkworm?
A. Egg
B. Pupa
C. Cocoon
D. Larva

Answer 1

Hint: Bombyx mori moth’s larva or the caterpillar is the silkworm. In China, silk has been made for the past five thousand years. The moth is very important because it makes silk. They feed on mulberry leaves. These are laid by the female moths.

Complete answer:
Egg: Egg is the starting stage of the silkworm’s life cycle. The female moth lay eggs that are in the size of small dots. Around 350 eggs are laid at one time. During the springtime, the eggs hatch due to the warmth in the air.
Pupa: The motionless stage is the pupa. It is at this stage people kill the pupa by putting the cocoon into the hot boiling water and unwind the silk.
Cocoon: This is the third stage of the cycle, in which the silkworm spins a protective cocoon around itself. The cocoon is the size of a small cotton ball and it is made up of a single thread of silk.
Larva: In the larva stage or caterpillar stage, the worm goes through four moults before it forms the pupa stage. In the first stage, there is the loss of the silkworm’s hair and it becomes a white, soft, and smooth caterpillar.

Hence, the correct answer is option A.

Note: The Silkworm, Bombyx mori produces silk of commercial importance. Four different stages of development are included in the silkworm life cycle: egg (ova), larvae, pupa, and imago. The first stage of the life cycle of a silkworm is the egg. A very small egg and a hard structure are laid by the female moth. For embryonic development, the eggshell provides a protective covering.