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1.Write a review of one Harvard Business Review articles of your choice. In your critical engagement, briefly describe the article (such as, its structure or organization, theoretical/ideological perspective of the author(s), methodological approach, or line or argument); give an overall evaluation of the article (that is, strengths and weaknesses); and critically analyze its contribution to the field. Your paper should be two pages double- spaced in APA format, complete with cover page, citations and references.
2. Fill in the blank spaces in the statement below
After fertilization of an ovule _________ develops into a testa and _________ develops into a testa and _____________ develops into endosperm. ( 2 marks)
3. State the difference between the composition of maternal blood entering the placenta and material blood leaving the placenta ( 3 marks)
4. After four months of pregnancy the ovaries of a woman can be removed without terminating pregnancy. However during the first four months of pregnancy the ovaries must remain intact if pregnancy is to be maintained. Explain these observations ( 3 marks)
5. Name two mechanisms that prevent self pollination in flowers that have both male and female parts ( 2 marks)
6. State three characteristics that ensure cross pollination takes place in flowering plants ( 3 marks)
7. Give a reason why it is necessary for frogs to lay many eggs ( 1 mark)
8. A flower was found to have the following characteristics
– Inconspicuous petals
– Long feathery stigma
– Small light pollen grains
(a) What is the likely agent of pollination of the flower? ( 1 mark)
(b) What is the significance of the long feathery stigma in the flower ( 1 mark)
9. State two ways by which the human Immuno Deficiency virus (HIV) is transmitted other than sexual intercourse? ( 2 marks)
10. Explain why sexual reproduction is important in organisms ( 3 marks)
11. State two disadvantages of self- pollination ( 2 marks)
12. The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
2n 2n
     z        z
n n n n
2n
n n
(a) What type of cell division takes place at Z? ( 1 mark)
(b) Where in the body of a female does process Z occur? ( 1 mark)
(c) On the chart indicate the position of parent and gametes ( 2 marks)
13. (a) What is meant by the terms
(i) Epigynous flower ( 1 mark)
(ii) Staminate flower (1 mark)
(b) How are the male parts of wind- pollinated flowers adapted to their function?
( 4 marks)
14. Name the part of a flower that developed into:
(a) Seed ( 1 mark)
(b) Fruit ( 1 mark)
15. (a) State two processes which occur during anaphase of mitosis ( 2 marks)
(b) What is the significance of meiosis? (2 marks)
16. (a) Explain how the following prevents self- pollination:
(i) Protoandry ( 1 mark)
(ii) Self- sterility ( 1 mark)
(b) Give three advantages of cross- pollination ( 3 marks)
SCIENCE
HEALTH SCIENCE
NURSING
