1. Winner effects were shown when established dominant chicks were placed against non-experienced chicks in a study by Drummond .
2. Winner - Effects were shown when established unexperienced chicks were placed in a study by Drummond against dominant chicks .

Select your answer from the options. Are these two sentences paraphrases of each other?
Options are:
(I). no.
(II). yes....I think the answer is
(I).