Submitted by admin on Sun, 05/18/2014 - 12:54
definition:
(Of an organism) living as a parasite: (be parasitic on)
sentence:
Mistletoe is parasitic on trees.
Since viruses are parasitic on cellular life, the first life could not have been anything like a virus.
Nevertheless, growing these parasitic plants in vitro is difficult, because of their dependence on a connection to hosts for normal development, and because of their specific germination requirements.
difficulty:
medium
toefl frequency:
2
toefl classification: