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1. What are Education, Teacher and all the Metaphysics of European and Russian Cultures in the context of the XXI Century?

2. What should be a Teacher Education Curriculum, and moreover, what principles should be chosen to make it up?

3. What are Technologies to stimulate continuous professional advance of teachers? Are they obviously IT and AI, or should we treat this concept in a more broad way?

4. How can we treat the management system in general and teacher education to get it a factor of development, not a detention?

5. In an investigation, a student collected two plants A and B. Plant A had hairy leaves and epidermis. Leaves of plant B

(i) Plant A ( 1 mark)

(ii) Plant B ( 1 mark)

6. An investigation was carried out between 1964 and 1973 to study the changes of fish population in a certain small lake. Four species of fish A, B, C and D were found to live in this lake. In 1965 a factory was built near the lake and was found to discharge hot water into the lake raising the average temperature from 250C to 300C. In 1967 sewage and industrial waste from a nearby town was diverted into the lake was stopped. The fish population during the period of investigation is shown in the table below.

Fish species          Fish populations during the period

1964 1966 1969 1970 1971 1972 1973

A

B

C

D 6102

208

36

4521 223

30

100

272 26

11

0

23 106

22

0

27 660

63

0

79 4071

311

0

400 7512

405

0

617

(a) (i) In which year were the fish populations lowest?

(ii) State the factors that might have caused the lowest fish populations during the year you have stated in (a) (i) above ( 3 marks)

(iii) Explain how each factor you have stated in (a) (ii) above could have brought about the changes in fish populations (11 marks)

(b) (i) What is the difference in the rate of population recovery of species A and 

D? (1 mark)

(ii) Suggest two biological factors that could have led to this difference 

(2 marks)

(c) (i) State a method that might have been used to estimate the fish population 

in the lake ( 1 mark)

(ii) State one disadvantage of the method you have stated in (c) (i) above

( 1 mark)

7. Industrial wastes may contain metallic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into rivers.

8. State three measures that can betaken to control infection of man by protozoan parasites ( 3 marks)

9. The chart below shows a feeding relationship in a certain ecosy

(a) Construct two food chains ending with a tertiary consumer in each case (2 marks)

(b) Which organisms has the largest variety of predators in the food web?  (1 mark)

(c) Name secondary consumers in the food web ( 2 marks)

(d) Suggest three ways in which the ecosystem would be affected if there was prolonged drought ( 3 marks)

10. To estimate the population size of crabs in a certain lagoon, traps were laid at random. 400 crabs were caught, marked and released back into the lagoon. Four days later, traps were laid again and 374 crabs were caught. Out of the 374 crabs, 80 were found to have been marked.

(a) Calculate the population size of the crabs in the lagoon using the formula below

N = n x M

     M

Where

N= Total population of crabs in the lagoon

n= Total number of crabs in the second catch

M= Number marked crabs during the first catch

M= Number of marked crabs in the second catch. ( 2 marks)

   (b) State two assumptions that were made during the investigation ( 2 marks)

(b) What is the name given to this method of estimating the population size?

( 1 mark)

11. The figure below represents a feeding relationship in an ecosystem

12. The diagram below represents a simplified nitrogen cycle

(a) Name the organisms that causes processes E and J ( 2 marks)

(b) Name the processes represented by F and H (2 marks)

(c) Name the group of organisms represented by c (i)

13. (a) Distinguish between a community and a population (2 marks)

(b) Describe how a population of grasshopper in a given area can be estimated

(5 marks)

14. Explain how the various activities of man have caused pollution of air ( 20 marks)

15. Explain how birds of prey are adapted to obtaining their food ( 2 marks)

16. (a) Name the crop infested by phytophthora infestants and the disease it 

causes

Crop –

Disease –

(b) State four control measures against the diseases ( 4 marks) 

17. Explain why the carrying capacity for wild animals is higher than for cattle in a given piece of land

SCIENCE
HEALTH SCIENCE
NURSING

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