Does anyone know why silkworm cocoons are yellow or white?

Question

Does anyone know why silkworm cocoons are yellow or white?

Answer 1

here's a link to all about silkworms:

http://en.wikipedia.org/wiki/Silkworm

it says that silkworms eat White Mulberry. i'm wondering if what they eat effects the color of their silk. kind of like how what we eat and drink effects our p**p and pee.