00434    a2200145   4500020001500000082001900015100001800034245004300052260005100095300001600146440003600162650001200198650005700210700002100267  a0749251042  a575.10724bCOH  aCohen, Norman  aScience matters bgenetic engineering   aMilton KeynesbThe Open Universityc1993g1993  a199p.c30cm  aScience: a second level course   aBIOLOGY  aSPECIFIC PARTS OF AND PHYSIOLOGICAL SYSTEMS IN PLANT  aMacQueen, Hilary