1. Some white colonies can not contain the desired recombinant plasmid for a number of reasons .
2. Some white colonies may not contain the desired recombinant plasmid for a number of reasons .

yes

1. The Berkeley edition was published in February 1985 , the third printing was in June 1985 , and the second printing was in November 1985 .
2. The Berkeley edition was published in February 1985 and the third was in June 1985 , and the second pressure was in November 1985 .

no

1. The two leased aircraft were returned to the BAE Systems lessor on 9 November 2006 .
2. Centavia 's two returned aircraft were leased to the lessor , BAE Systems , on November 9 , 2006 .
no