(a) Define the following in
(i) elimination
(ii) excretion
(iii) secretion.

(b) Describe the digestion of boiled fish in the gut of humans

(c) Make a diagram 8cm - 10am long of a longitudinal section of a villus and label fully.

 (a) Explain briefly the following ecological terms:
(i) biosphere
(ii) habitat

(b) Describe the mode of nutrition in a named carnivorous plant.

(c) State three reasons why the dispersal of fruits and seeds are important.

(d) State six methods of conserving soil.

(a)(i) Explain the term co-ordinance.

(ii) Calculate the number of individuals with co-dominant blood group. 

(iii) What is the total number of individuals in the table that are able to donate blood to an accident victim with blood group B?

(b) A man whose blood group is heterozygous A is married to a 
woman whose blood group is AB. With the aid of a genetic diagram, suggest the possible blood groups of their children.

A survey to determine blood groups was carried out on 250 people living in a community. The results are represented in the table below. 

 (a) State five reasons why animals move from place to place.

(b) State one function each of the following structures found in plants:
(i) epidermis
(ii) phloem
(iii) sclerenchyma.

(c) Give two examples each of the following types of organisms:
(i) parasitic plants
(ii) saprophytes.

(d) State two adaptive features of plants which inhabit salt water swamp.

(e) State two factors each which result in
(i) increase
(ii) decrease, in population density.

(f) Mention four ways in which modern agricultural activities may threaten the survival of species.

(g) State three reasons why mitosis is important to living organisms

(h) State three causes of food spoilage. 
 

Observe specimens A, B, C and D closely and use them to answer questions 1(a) to 1(e).

(a)(i) Specimen A Into its division and class.

(ii) State three observable features of specimen A which are characteristics of the class mentioned in 1(a)(i) above.

(b) State the relationship between specimen A and: (i) specimen B; (ii) specimen C; (iii) specimen D.

 (c)(i) From. your observations of specimens B and C, what type of plant is specimen A? (ii) Suggest the agent of pollination ot specimen B.

(iii) State two reasons for the answer in 1(c)(i) above.

(d) Classify specimen D fully according to origin and structure.

 (e) Make a drawing 8 cm 10 cm long of specimen C and label fully.