Wednesday, January 25, 2012


Research on the following:

1. Compare Mitosis and Meiosis completely with diagram.
2. Research about the structure of a gene.
3. How does DNA gets replicated?
4. List and explain hereditary diseases. As many as you can find.
5. What is co-dominance and incomplete dominance?

Tuesday, January 24, 2012


1. Discuss the effects of the combustion of fossil fuels and the cutting down of forests
on the oxygen and carbon dioxide concentrations in the atmosphere.
2. List the undesirable effects of deforestation (to include extinction, loss of soil,
flooding, carbon dioxide build up).
3. Describe the undesirable effects of pollution to include:
• water pollution by sewage and chemical waste,
• air pollution by greenhouse gases (carbon dioxide and methane) contributing
to global warming.
4. Describe the undesirable effects of overuse of fertilisers (to include eutrophication
of lakes and rivers).
5. Discuss the causes and effects on the environment of acid rain, and the measures that might
be taken to reduce its incidence.
6. Explain how increases in greenhouse gases (carbon dioxide and methane) are
thought to cause global warming.
7. Describe the need for conservation of:
• species and their habitats,
• natural resources (limited to water and non-renewable materials including
fossil fuels).
8. Research on the expedition of the Pacific floor and discovery on its ecosystem.
9. Define and explain the limiting factor in an environment.
10. Compare overcrowding and under crowding through advantages and
11. Give some ways by which organisms adjust to varying temperatures. Support your
answer with at least five examples.
12. How is population density increased or decreased?
13. Explain how soil controls the distribution of plants and animals in Indonesia.
14. How does tolerance of an organism to any factor in the environment limit its distribution?
15. Why is light important to all organisms?
16. Explain how topography affects animal or plant distribution to separate places.
17. Explain how humans disrupt the ecological balance.
18. Provide solutions to the different ecological problems.
19. What is an ecological balance? Discuss the roles of humans in its maintenance.
20. Define pollution. What are the types of pollution?
21. Research about Styrofoam.
22. How does Oil spills affect the ecosystem?
23. How is noise considered as pollution?
24. Why is there a need for conservation?

Monday, January 16, 2012


1. Define homeostasis
2. Identify and discuss the diagram of the skin: hairs, sweat glands, temperature receptors, blood vessels and fatty tissue.
3. Describe the maintenance of a constant body temperature in humans in terms
a. of insulation and the role of temperature receptors in the skin
b. sweating, shivering,vasodilation and vasoconstriction of arterioles supplying skin-surface capillaries
c. the coordinating role of the brain.
4. Explain the concept of control by negative feedback.
5. Describe the control of the glucose content of the blood by the liver, and by insulin and glucagon from the pancreas.



1. Explain through an example how the two general sets of factors, heredity and environment determine characteristics of an organism.

2. Gregor Mendel's life and works.

3. Why did Mendel make a good choice with his peas?

4. What do the terms dominant and recessive mean?

5. What is the law of segregation?

6. What is a sex linked trait?

7. What is a sex influenced trait?

8. what is a sex limited trait?

9. What is a non-mendelian inheritance?

10. What causes mutation?

11. Who is Thomas Hunt Morgan?

12. How did Morgan's discovery differ from Mendel's?

13. How is blood type inherited?

14. Special cases of heredity.

15. Hybridization.

16. Selection and Inbreeding.

17. Genetic improvements on humans.