(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.
 

(a) List four floral parts of a flower.

(b) (i) In a tabular form, state five differences between wind and insect pollinated flowers.
(ii) Give one example of each.

(c) (i) State three agents of fruit and seed dispersal.
(ii) Give an example of fruits or seeds dispersed by each agent

(d) (i) Define the term "hormones.
(ii) Name one plant hormone.
(iii) State two effects of plant hormones. 
 

(a) mention four caste found among termite nests

(b)(i) state one role of each caste to the colony.
(ii) mention two ways by which termites are of economic importance to man

(c)(i) mention two types of courtship behaviour in lower animals
(ii) state two importance of courtship behaviour in the reproduction of lower animals

(d) Describe briefly the courtship behaviour exhibited by Agama lizard

(a) Define the term organic evolution

(b) Outline the contribution of 
(i) Larmack
(ii) Darwin to organic evolution

(c) List three evidences of organic evolution

(d) Explain the role of
(i) Mutation
(ii) Isolation in the form of new species

(a) Describe an experiment to compare the water-holding capacity of sandy, loamy and clayey soils.

(b) List three factors that may affect the water-holding capacity of soils.

(c) (i) State the characteristics of sandy and loamy soils.
(ii) What type of vegetation does each support?