pf3 2706 pks1.4

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1 The diagram below shows two types of organisms. a) Classify these two organisms as a unicellular organism and a multicellular organism. P:________________________________________________________ ____________ Q:________________________________________________________ ____________ b) Explain briefly why human beings are classified in the same group as Q. __________________________________________________________ __________________________________________________________ ________________________ c) The diagram below shows three system in the human body.

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SCIENCE FORM 3

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Page 1: PF3 2706 PKS1.4

1 The diagram below shows two types of organisms.

a) Classify these two organisms as a unicellular organism and a multicellular organism.P:____________________________________________________________________Q:____________________________________________________________________

b) Explain briefly why human beings are classified in the same group as Q.

____________________________________________________________________________________________________________________________________________

c) The diagram below shows three system in the human body.

Based on the above diagram, identify these systems.X:____________________________________________________________________Y:____________________________________________________________________

Page 2: PF3 2706 PKS1.4

Z:____________________________________________________________________

Page 3: PF3 2706 PKS1.4

2 The diagram below shows the menstrual cycle of a woman in a period of twenty-eight days.

a) If the woman begins the menstruation process on day 1, state the daysi) that the process of ovulation occurs. ____________________________________________________________________

ii) that the uterine lining builds up again into thick blood vessels layers._____________________________________________________________________

iii) That the menstruation takes place.___________________________________________________________________

b) According to your answer in (a), which days are considered as a fertilize phase?______________________________________________________________________

c) According to your answer in (a) and (b), arrange the following menstrual events to show the correct order of menstrual cycle.

1. The ovum cell is released.2. The uterus wall disintegrates.3. The uterus wall thickens.4. The menstruation occurs.

Page 4: PF3 2706 PKS1.4

3 a) Plants exhibit a number of other growth responses to environmental stimuli. One of these is nastic movement which occurs in response to touch.

i) What happens when the plant is touched?____________________________________________________________________

ii) What is the advantages of this response to the above plant?

________________________________________________________________________________________________________________________________________

b) Plants cannot move from one place to another. Plants can only grow towards stimuli or avoid stimuli.

i) Name the type of response shown in the diagram given.____________________________________________________________________

ii) Explain how this response to l;ight will be useful to plants.

________________________________________________________________________________________________________________________________________

c) The statement below describes two parts of plants.

- Part X shows positive hydrotropism and negative phototropism.- Part Y shows negative hydrotropism and positive phototropism.

Page 5: PF3 2706 PKS1.4

Identify parts X and Yi) Part X:________________________________________________________

ii) Part Y:_________________________________________________________

4 Diagram below shows structures of a flower.

a) Based on the diagram above, circle the female organ for flower.

b) Name the structure that formed male organ in flower._____________________________________________________________________

c) What is the difference between unisex and bisex flower?_____________________________________________________________________

d) Diagram below shows a plant.

Explain the advantages of the pollination showed in the diagram above.__________________________________________________________________________________________________________________________________________ _____________________________________________________________________