Submitted by admin on Mon, 04/28/2014 - 18:50
definition:
The commercially bred caterpillar of the domesticated silk moth (Bombyx mori), which spins a silk cocoon that is processed to yield silk fibre
sentence:
The domesticated silkworm is one of a few species that have been used for genetic analysis.
difficulty:
medium
toefl frequency:
1
toefl classification: