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THE WORLD THROUGH OUR SENSES

2 Which part of a plant shows positive phototropism?

A RootB ShootC StemD Fruit

PMR 2008

3 Which of the following sensory organs can detect touch, pain and pressure?

A EyesB NoseC EarsD Skin

PMR 2007

4 The Following information shows a type of response of a plant due to a stimulus.

Which of the following is the response?

A GeotropismB PhototropismC ThigmotropismD Hydrotropism

PMR 2006

1 Diagram 6 shows a section through part of a human head containing sensory organ.

Which of the parts labelled A,B,C or Dis a sensory cell?

PMR 2008

- shoot grows away from the stimulus

- enables the plant to obtain water and minerals- roots grow towards gravitional attraction

Diagram 6

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5 The diagram shows the path of an impulse after a stimulus is received by the skin.

Which of the following represents X, Y and Z?

X Y Z

A Brain Effector Receptor

B Receptor Effector Brain

C Brain Receptor Effector

D Receptor Brain Effector

PMR 2005

6. The diagram shows a change in size of the pupil

Which of the following action will cause this change?

A Reading a book in a dark roomB Entering a darkroom from a bright room

C Taking off sun glasses in a bright placeD Looking at a distance object after looking at a near object.PMR 2004

X ZY NerveNerveStimulus

Pupil

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1 Diagram 1.1 shows how human eye can see. (PMR 2007)

Diagram 1.1

(a) (i) State one difference between object Qand image I.

_________________________________________________________________(1 mark)

(ii) Howdoes the size of the imageI change when the eye is 10 cm from object Q?

________________________________________________________________(1 mark)

(iii) State onereason for the answer in 1(a)(ii).

________________________________________________________________

________________________________________________________________(1 mark)

(b) (i) CompleteDiagram 1.2 to show the formation of an image of a distant object onthe retina of the eye of a short sighted person.

Diagram 1.2

(ii) Whatcauses the situation in Diagram 1.2 to happen?

________________________________________________________________

________________________________________________________________(1 mark)

(iii) Howcan the situation in Diagram 1.2 be corrected?

_______________________________________________________________(1 mark)

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NUTRITION

1 Which food pyramid is the best guide to plan a balanced diet?

PMR 2008

2 The calorific value of rice is 15 kJ/g.Calculate the calorific value in 100g of rice.

A 15 kJ

B 30 kJ

C 1500 kJ

D 3000 kJ

PMR 2007

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3 The diagram shows organs in a human digestive system.

Which of the following are the functionsof J, K, L and M?

PMR 2006

J K L M

A To digest starch To performperistalsis

To digest protein To digest fat

B To digest starch To digest protein To digest fat To perform peristalsis

C To digest protein To performperistalsis

To digest fat To digest starch

D To digest protein To digest starch To performperistalsis

To digest fat

4 The diagram shows a boy who is suffering from kwashiorkor disease.

Which of the following is the causeof the disease?

A Drinking too much waterB Lack of protein in the dietC Lack of calcium in the dietD Too much carbohydrate in the diet

PMR 2005

5 Which of the following pairs of food classes and examples is notcorrect?

Food class Example

A Protein Chicken meat

B Carbohydrate Noodles

C Roughage Papaya

D Fat Potato

PMR 2004

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1 Figure 1.1 shows the human digestive system.(PMR 2004)

Figure 1.1

(a) (i) Labelone of the following structures in Figure 1.1.

(1mark)(ii) Stateonefunction of the structure in (a) (i).

_________________________________________________________________(1 mark)

(b) A student carried out a food test on sample X.Table 1.2 shows the results of the test.

Food test Observation Food class

Sample X is crushed andadded with Millon's

reagent

Red precipitate wasformed ___________________

Sample X tested on filterpaper

Grease spot was formed___________________

TABLE 1.2

(i)Complete Table 1.2 by naming the food classes that are present in sample X.(1 mark)

(ii) Explainwhat happens to the food sample X while it is inside structure Q.

___________________________________________________________________(2 marks)

(iii) State what happens to the final product in (b) (ii).

__________________________________________________________________

__________________________________________________________________(1 mark)

Pancreas Liver Oesophagus Mouth

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2 Figure 2.1 shows an experiment to study the action of saliva on starch. The result of theexperiment after 30 minutes is shown in Table 2.2. (PMR 2005)

Figure 2.1

Test tube Presence of starch

X No

Y Yes

Table 2.2

Based on Figure 2.1 and Table 2.2, answer the following questions.

(a) (i) Whymust test tubes X and Y be kept in the water bath at 37oC?

_________________________________________________________________(1 mark)

(ii) Statethe reason why there is no starch in test tube X.

________________________________________________________________

________________________________________________________________(2 marks)

(iii) In whichpart of the alimentary canal does the same enzyme action occur asin the test tube X?

________________________________________________________________(1 mark)

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(b) Figure 2.2 shows pictures of several foods.

Figure 2.2

Based on the pictures, complete the table below by writing the different food classes

and their food samples.

Food classes Food sample

(i) Carbohydrate Bread

(ii) ______________________________ ______________________________

(iii)_______________________________ ______________________________

(iv)_______________________________ ______________________________

(v)_______________________________ ______________________________

(vi)_______________________________ ______________________________

(5 marks)

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BIODIVERSITY

1. The following information shows the characteristics of a plant.

Which plants have these characteristics?

A Paddy and grassB Paddy and balsam plantC Grass and ibiscus plantD Hibiscus plant and balsam plant

PMR 2008

2 Which of the following groups of animals are cold-blooded?

A Pigeon, Elephant, FrogB Gold fish, Snake, FrogC Elephant, Pigeon, FrogD Pigeon, Gold fish, Snake

PMR 2007

- fibrous root system- parallel veined leaves- one cotyledon in each seeds

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1 Figure 1 shows a picture of animals, R, S, T, U and V. ( PMR2004)

Figure 1

Based on your observations in Figure 1,

(a) Stateonecharacteristic of any fourof animals R, S, T, U and V.

R : ________________________________________________________________

S : ________________________________________________________________

T : ________________________________________________________________

U : ________________________________________________________________

V : ________________________________________________________________(4 marks)

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(b) Classifyanimals R, S, T, U, and V into two groups based on common

characteristics.

Namethe animals belonging to each group.

Commoncharacteristics

Name ofplants

(4 marks)

2. Figure 2 shows pictures of plants J, K, L, M and N. (PMR 2005)

Figure 2

R, S, T, U and V

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Observethe plants in Figure 2.

Based on your observations,(a) Stateonecharacteristic of any fourof plants J, K, L, M or N .

J : _______________________________________________________________

K : _______________________________________________________________

L : _______________________________________________________________

M : _______________________________________________________________

N : _______________________________________________________________(4 marks)

(b) Classifyplants J, K, L, M, and N in Figure 2 into two groups based on commoncharacteristics.

Namethe plants belonging to each group.

Commoncharacteristics

Namesof plants

(4 marks)

J, K, L, M, N

Group 1 Group 2

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INTERDEPENDENCE

2. Diagram 8 shows one of a human activity.

Why should this activity be stopped?

A Causes air pollutionB Increases the humidity in airC Destroys the habitat of flora and faunaD Reduces the percentage of carbon cycle

PMR 2008

3. Which activity can prevent the hole in the ozone layer from getting bigger?

A Replant more treesB Avoid the burning of fossil fuelC Stop using pesticides and fertilizer in farmingD Avoid buying products that contain chlorofluorocarbon

PMR 2008

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5

100

500

5000

Snake

Fro

Cater illar

Leaves

4. Diagram 7 shows two processes, Q and R, in a plant.

Which of the following are represented by P, Q, R and S?

P Q R S

A Carbon dioxide Respiration Photosynthesis Oxygen

B Carbon dioxide Photosynthesis Respiration Oxygen

C Oxygen Photosynthesis Respiration Carbon dioxide

D Oxygen Respiration Photosynthesis Carbon dioxide

PMR 2007

5. Diagram 6 shows a pyramid number in a habitat.

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Which of the following shows the effect on the habitat if all the snakes in the habitatare killed?

A

B

C

D

PMR 2007

Frog

Frog

Cater illar

Leaves

Frog

Cater illar

Leaves

Frog

Cater illar

Leaves

Cater illar

Leaves

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6. Diagram 7 shows processes P, Q, R and S that occur in the carbon cycle.

Produce carbon dioxideAbsorb carbon

dioxide

A P, Q R, S

B R, S Q, P

C P, Q, S RD Q, R, S P

PMR 2007

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7 The following is a list of organisms.

Choose the correct food web for the organisms.

ACaterpillar Sparrow

Paddy EagleRat Cobra

BCaterpillar Cobra

Paddy EagleRat Sparrow

CRat Cobra

Paddy EagleSparrow Caterpillar

DSparrow Cobra

Paddy EagleCaterpillar Rat

PMR 2007

- rat- paddy- caterpillar

- cobra- sparrow- eagle

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Z Z

Z

Z

Z ZZ

Z

Y

Y

Y

X

X

X

X

XX

X

X

X

X

X

8 Diagram 9 shows a habitat occupied by three types of organisms, X, Y and Z.

Diagram 9

A

B

C

D

PMR 2006

X

Y

Z

X

Y

Z

X

Y

Z

X

Y

Z

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PR

S

Q

9 The graph shows the number of organisms P, Q, R and S in a habitat.

A

B

C

D

PMR 2005

S

P

R

Q

S

R

P

Q

P

S

R

Q

Number oforganism

Type of organismP Q R S

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10 The diagram shows the organisms in a forest habitat.

Which of the following food webs is found in the habitat?

AMagpie Rabbit Snake

PlantGrasshopper Eagle

B

Grasshopper Magpie SnakePlant

Rabbit Eagle

CPlant Grasshopper Rabbit Snake

Magpie Eagle

D

Grasshopper Magpie SnakePlant

Rabbit Eagle

PMR 2004

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1 Figure 1 shows the carbon cycle. (PMR 2004)

Figure 1

(a) Complete the carbon cycle in Figure 1 using processes chosen from thefollowing list:

(2 marks)

(b) Statetwofunctions of plants in the carbon cycle

1. ______________________________________________________________

2.______________________________________________________________(2 marks)

(c) Based on Figure 1, statetwoeffects of deforestation.

________________________________________________________________

________________________________________________________________(2 marks)

Photosynthesis Combustion Respiration