Example sentences of "then [pron] [vb -s] [conj] [adj] [noun pl] " in BNC.

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1 If this is the case , then it suggests that remarkable similarites exist between the vertebrate smooth muscle ( 9 ) and nonmuscle MHC genes ( 11,21 ) in terms of their ability to generate isoform diversity by the mechanism of alternative splicing .
2 If natural selection were given its head , and an infinite amount of time to work in , then it seems that all lineages would tend inexorably towards ‘ perfection ’ ; where perfection was defined as perfect adaptation .
3 I do n't believe it was a coincidence , and if it was n't — ’ he had finally sorted it out — ‘ if it was n't then it means that Sardinian shepherds dressed themselves up as Sardinian shepherds to do a kidnapping .
4 If harmful insects can protect themselves from attack by displaying special markings that warn away predators , then it follows that harmless insects can benefit by mimicking them .
5 But then what happens when three minutes is too long ?
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