(i) Environmental conditions
(ii) Genetic control
(iii) Genetic clock
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer-(d) i, ii and iii
Educational Website
(i) Environmental conditions
(ii) Genetic control
(iii) Genetic clock
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer-(d) i, ii and iii