(a) (i) What are derived quantities?
(ii) State the S.I. units of the following quantities:
(α) area;
(β) volume.

(b) (i) State two factors necessary for photosynthesis
(ii) Explain the functions of each of the factors stated in (i)

(c) Explain each of the following terms:
(i) soft water;
(ii) hard water.

(d) State three reasons why some seeds are nursed.