Note: Attempt TEN questions. All questions carry equal marks.

1. Discuss in brief, the contribution of Muslim scientists in the field of biological science.

2. Describe, in precise statements, various instruments which are being used in exploring the universe.

3. Explain the Solar System and the unifying characteristics which the Sun and its planets have.

4. How the solar and lunar eclipses are caused?

5. What is Ozonoshpere? Discuss the human technologies which are causing its depletion. What ham to man this depletive state would cause?

6. Describe the principle and make up of a Television.

7. What is escape velocity? How the Satellite are launched and what are their uses?

8. Explain Earthquakes and volcanoes. How volcanoes help in the formation of earth crust?

9. How characters are transmitted from parents to offspring?

10. Describe the function of kidneys in the human body.

11. What are the deficiency effects of the following nutrients in the human body?

a) Iron
b) Iodine
c) Fluoride
d) Vitamin A
e) Vitamin D

12. What are the constituents of human blood and their characteristics.?

13. Differentiate between

a) Neuron and neutron
b) Meiosis and mitosis
c) Heavy water and hard water
d) Climate and weather
e) Isotopes and isobars

14. Fill in the blanks.

a) Plant cells manufacture their food due to the presence of ____________ (chlorophyll, vacuole, cell wall)

b) The mitochondria in a cell are the constituent of the ____________ (nucleus, cytoplasm, cell membrane)

c) Mitosis is a type of cell division wherein the number of chromosomes in the daughter cell is the ____________ (same, half, double)

d) Blood cells are of ____________ types (two, three, four)

e) The ____________ causes sunburn and suntan (ultraviolet rays, alpha particles, gama radiation)

15. Which of the following statements are false or true. Write only true of false in the answer book. Do not reproduce the questions.

a) Xylem and Phloem are conducting tissues.

b) Carbohydrates are cheapest and most ready source of energy.

c) Enzymes are responsible for chemical digestion of food.

d) Plasma is the fluid part of the blood in which the cells are suspended.

e) Hemoglobin combines with oxygen and transport to different cells of the body.

f) Neutron is the negative charged particles in an atom.

g) Helium is the lightest gas.

h) Venus is the smallest planet of the solar system.

i) Image of an object is formed on the retina of the eye.

j) Barometer is used for measuring the current.

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The Me you have always known, the Me that's a stranger still.