Contoh soal IPA (Biologi) SD

4th International Mathematics & Science Olympiad

for Primary School 2007

Soal 3.1

Some animal have strategies to escape from predators or enemies, such as producing a bad smell, changing color,etc. Which is the following tactics is used by squid?

a. By curling its body

b. By having an electric tail

c. By detaching its tail easily

d. By excreting inks

e. By changing body color

Soal 2.2

Animal in the house may indicate a potential disease that may spread in the family. If you have a cat in the house, choose the following disease that may spread by the cat to human:

a. dengue

b. avian influenza

c. AIDS

d. polio

e. tuberculosis

3.2

Why does the seed of the coffee have a very tough seed coat? The seed can ….

a. dispersed by propulsion

b. extend the distance of its dispersal by traveling breezes

c. adhere to passing animals

d. survive the mechanical forces and conditions of the animals guts

e. attract the animals

1.2

Plants use water for ….

(1) cell growth (2) photosynthesis (3)germination

a. (1) and (2)

b. (1) and (3)

c. (2) and (3)

d. (1), (2), and (3)

e. None of them

4.2

• Which of the following statements about an animal’s size and shape is not true?

a. Larger animals require more food than smalest animals

b. Larger animals produce more waste than smaler animals

c. Larger animals are more vulnerable to cold than smaller animals

d. Larger animals require more oxygen than smallest animals

e. Larger animals require larger area than smaller animals

9.2

If you want to make your plant increase in height, which part of the plant you have to cut?

a. Terminal bud

b. Flower

c. Axillary bud

d. Stem

e. Internode

11.2

• Which of the following substances can be recycled in an ecosystem?

• (1) carbohydrate (2) water (3)nitrate

A. (1) and (2)

B. (1) and (3)

C. (2) and (3)

D. (1), (2), and (3)

E. none of them

14.2

• Which of the following type of reproduction produces offspring with identical genotypes?

(1) Buds from the same potato tuber;(2)seeds from the same potato;(3)spores the same fungus

a. (1) and (2)

b. (1) and (3)

c. (2) and (3)

d. (1), (2), and (3)

e. None of them

If an animal is subjected to repeat stimulation, it may gradually cease to respond. This is an example of:

a. Selection

b. Habituation

c. Sign of stimulus

d. Irritability

e. reflex

The following picture should be used to answer the next two question

22 a.2

• What are the conditions of the heart valves when the ventricles are all relaxed?

a. valves 1 and 2 are closed; valves 3 and 4 open

b. Valves 1 and 3 are closed; valves 2 and 4 are open

c. Valves 1 and 3 are open; valves 2 and 4 are closed

d. Valves 1 and 2 are open; valves 3 and 4 are closed

e. All the valves are open

22.b.2

• Some people may have a hole in the septum that separates chambers X and Y. What problem will they have?

a. They may develop anemia

b. They may a lower blood pressure

c. Their blood may not be able to clot normally

d. Their arterial blood may not be fully oxygenated

e. They may have a higher blood pressure

25.2

• An ecologist studied the number of organism in grassland area over three year period :

Year Grasshoper Mice Insectivorous bird Grassland area

1 220 15 1 10 hectares

2 140 16 0 7 hectares

3 80 14 5 3 hectares

• Pick from the following choices to answer question (a), (b), (c) :

a. mice population is increasing

b. Mice population does not depend on the area of grassland

c. Insectivorous birds is migrating into area

d. Insectivorous birds depends on population of grasshoper

e. The grassland area affects the population

(a) What the best explanation for the decrease in the population of grasshopers from year 1 to year 3 ?

(b) What the best explanation for the change in the mice population?

(c)What the best explanation for the change in the bird population?

26.2

a) Ultraviolet light from the sun has ….properties and can be used to sterilize tools

b) Ultraviolet light has to other medical effects such as the production of ….

c) Ultraviolet light is strongly reduced by earth’s ….

d) The variation of ultraviolet light with latitude is responsible for many biological adaptations, including variation in human…

• Vitamin D• Sunburn• Antiseptic• Globe• Atmosphere• Magnetic lid• Skin color

12.2

• In order to increase speed and agility, an animal uses different kinds of strategy. Complete the table by writing the body part used by the animal.

Animals Reduce friction Increase friction

Fish Streamline body,

Bird Flap & tail

frog Mucous skin

5.1

• Which one of the activities described in the table below does not match the characteristic of all living things.

Characteristic Activity

A Excretion Removal poisonous waste products

B Reproduction Making new individuals

C Sensitivity Responding to stimuli

D Growth Decrease in total body weight

E Nutrition Require food

6.1

• Elvira wants to prove that plants need some nutrients in the soil. In order to test her idea she uses two pots of plants. Draw another sets that she use as a control set-up

7.1

• Choose a hypothetical graph to show the respiration of an animal in closed chamber over a period of time

• A. B.

c. D. E.

14.1

• Desert is an area characterized by low rainfall, high evaporation and low humidity. In such a condition, desert plants survive by adapting themselves structurally and physiologically. Which of the following is the least possible adaptation of desert plants?

a. shallow and spreading rootsb. Fleshy leafsc. Thin and wide leavesd. Green steme. Thick-cuticle leafExplain your answer.

15.1

• Two identical plants are grown in two different places,dark (plant A) and light (plant B). After some weeks, what is the appearance of both plants?

Plant A (dark) Plant B (light)

Leaf Light green/dark green

Light green/dark green

Stem Thick/Thin Thick/Thin

22.1

• The lowest transpiration occurred when the air is ….

a. hot, damp, not windy

b. Cold, damp, not windy

c. Hot, dry, windy

d. Cold, dry, windy

e. Hot, dry, not windy