9 5 1 ▁to ▁June ▁ 1 9 5 5 . ▁T ew ol de ▁was ▁accepted ▁to ▁General ▁Wing ate ▁Second ary ▁School ▁in ▁Add is ▁Ab aba ▁and ▁studied ▁there ▁from ▁September ▁ 1 9 5 5 ▁to ▁July ▁ 1 9 5 9 . ▁He ▁was ▁then ▁accepted ▁to ▁Add is ▁Ab aba ▁( then ▁Ha ile ▁Sel ass ie ▁I ) ▁University , ▁Add is ▁Ab aba ▁where ▁he ▁studied ▁from ▁September ▁ 1 9 5 9 ▁to ▁July ▁ 1 9 6 3 ▁and ▁won ▁the ▁Chan cell or ' s ▁Gold ▁Medal ▁for ▁best ▁gradu ate ▁in ▁the ▁Fac ulty ▁of ▁Science . ▁He ▁studied ▁at ▁the ▁School ▁of ▁Plant ▁Bi ology , ▁University ▁of ▁North ▁Wales ▁from ▁October ▁ 1 9 6 6 – Nov . ▁ 1 9 6 9 ▁and ▁was ▁awarded ▁a ▁Ph D ▁under ▁Prof . ▁P . ▁Gre ig ▁Smith . ▁Ph . D . ▁ ▁He ▁worked ▁in ▁the ▁Bi ology ▁Department ▁at ▁Add is ▁Ab aba ▁University ▁from ▁ 1 9 6 3 , ▁serving ▁as ▁a ▁gradu ate ▁assistant , ▁assistant ▁lect urer , ▁and ▁assistant ▁professor . ▁He ▁was ▁appointed ▁de an ▁of ▁the ▁Fac ulty ▁of ▁Science ▁in ▁ 1 9 7 4 , ▁and ▁served ▁in ▁this ▁capacity ▁until ▁ 1 9 7 8 , ▁when ▁he ▁was ▁appointed ▁Associ ate ▁Professor ▁of ▁Bi ology . ▁In ▁ 1 9 7 8 ▁he ▁also ▁began ▁working ▁part ▁time ▁with ▁the ▁Eth iop ian ▁Science ▁and