(a) (i) Differentiate between egestion and digestion in nutrition.
(ii) What is the end-product of digestion?

(b) Give one example of a chemical compound used in:
(i) medicine;
(ii) agriculture
(iii) industry

(c) (i) Define the term soil profile.
(ii) State two ways in which soil profile is important in crop production.

(d) (i) State two steps used by scientists in doing their work.
(ii) Give two subjects that may be considered as applied sciences.