(b) State four hereditary features in humans

(c) State the energy transformation that takes place in each of the following activities:
(i) dry cell in use;
(ii) solar panel in use;
(iii) electric stove in use;
(iv) hammering of a piece of metal

(d) State two ways each in which each of the following cultural practices is important in vegetable production:
(i) staking
(ii) pruning