Genetics and evolution / Kate and Chris Liffen. Liffen, Kate. Liffen, Chris. Genetics Study and teaching (Secondary) Great Britain. Evolution Study and teaching (Secondary) Great Britain. 572.838 KAG London : Hodder & Stoughton Educational, 1994 ( 1998 printing ). 1994 ( 1998 printing ). 1994 Text 32 p. : eng Science scene Great Britain. Great Britain.