(a) (i) Name the two stages involved in photosynthesis.
(ii) Write an equation to represent the first stage of photosynthesis.

(b) (i) List six modes of nutrition in organisms.
(ii) Name one feature that makes feeding possible in the following organisms: I. Paramecium; II Spirogyra; Ill Rhizopus; IV Tape worm.

(c) Define the term balanced diet.

(d) (i) State three characteristics of enzymes.
(ii) in a tabular form, indicate the source, substrate acted upon and the product of the following enzymes: ptyalin and pepsin.