At which stage in its life cycle does the silkworm yield the fiber of commercial use? A)Larva B)Egg C)Pupa D)Imago
Option C) It is during the pupa or cocoon stage that the silkworm yields the fiber of commercial use. As the silkworm prepares to pupate, it spins a protective cocoon. About the size and color of a cotton ball, the cocoon is constructed from one continuous strand of silk, perhaps 1.5 km long (nearly a mile). The silk cocoon serves as protection for the pupa.
