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SCIENCE PRACTICE QUESTIONS

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ECOSYSTEMS

1.

Green plants have the ability to make their own food hence they are known as

A.

producers.

B.

parasites.

C.

consumers.

D.

decomposers.

2.

Producers in an ecosystem are plants that

A.

attract insects

B.

feed on other plants

C.

feed on dead materials

D.

manufacture their own food

3.

Grasshopper management is crucial because of all the following reasons except

A.

damage to crops.

B.

incomplete metamorphosis.

C.

ecosystem disruption.

D.

livestock harm.

4.

Green plants have the ability to make their own food hence they are known as

A.

producers.

B.

parasites.

C.

consumers.

D.

decomposers.

5.

All of the following are herbivores except

A.

sheep

B.

dog

C.

goat

D.

grasscutter

6.

A fish dies shortly after being removed from water. This is because it

A.

cannot swim

B.

is streamlined

C.

is hot on land

D.

has scales

7.

Which of the following habitats are you likely to find a tadpole?

A.

Bush

B.

Sea shore

C.

Pond

D.

Deep well

8.

Plants with thorns are not usually eaten by animals. The thorns therefore
A.
assist the plants to grow
B.
make the plant strong
C.
render the plant poisonous
D.
protect the plant

9.

Which of the following is not a mammal?

A.

Whale

B.

Bat

C.

Cat

D.

Hen

10.

Which of the following animals can live both in water and on land?

A.

Mouse

B.

Rat

C.

Frog

D.

Grasscutter

11.

All of the following animals lay eggs except

A.

fish

B.

lizard

C.

rabbit

D.

toad

12.

The lion is a typical example of

A.

a pet

B.

a carnivore

C.

an omnivore

D.

a herbivore

13.

Which of the following human activities causes pollution of the environment?

A.

Cutting down timber in the forest for firewood

B.

Overgrazing of the field by cattle

C.

Burning of coal and petrol in industries

D.

Building dams across rivers

14.

Which of the following statements about feeding relationships is not true?

A.

Energy is transferred from one organism to another

B.

A green plant is the basis of any food chain

C.

Bacteria feed on dead organisms for energy

D.

A carnivore feeds on green plants for energy

15.

Which of the following practices in a community will increase its environmental pollution?
A.
Building of schools with workshops
B.
Planting of trees on large areas of land
C.
Depositing of household rubbish near a source of drinking water
D.
Removal of sand and refuse from choked gutters

16.

Which of the following gases is not an air pollutant?

A.

cigarette fumes

B.

carbon dioxide

C.

sulphur dioxide

D.

exhaust fumes

17.

During the dry season most trees shed their leaves to

A.

protect the tree

B.

avoid being pulled down by strong winds

C.

conserve water and nutrients

D.

discourage animals from eating the leaves

18.

Which of the following living organisms is not a reptile?

A.

Lizard

B.

Tortoise

C.

Frog

D.

Snake

19.

The following are steps involved in how nutrients in decaying organic matter finally get to man.

I. The mineral in them go into the soil

II. Man goes to eat the plant food

III. They dissolve in soil water

IV. They are used up by plants during photosynthesis

Which of the following arrangements represents the correct order in which the processes occur?

A.

I, II, III and IV

B.

I, III, IV and II

C.

IV, II, III and I

D.

II, III, I and IV

20.

The linear sequence of living things feeding and being fed on is called
A.
linear feeding
B.
food chain
C.
photosynthesis
D.
nutrition

21.

Animals that live in grasslands include

A.

lions and giraffes

B.

monkeys and tigers

C.

antelopes and hares

D.

woodpeckers and baboons

22.

Which of the following living things hide during the sunny days in order to conserve water in its body?

A.

Rat

B.

Lizard

C.

Butterfly

D.

Toad

23.

Most plants will not do well in the desert because

A.

there is no top soil

B.

it is too sunny there

C.

rainfall is very poor

D.

the speed of wind is high

24.

Which of the following features is common to both the fish and the lizard? The possession of

A.

a sticky tongue

B.

a lateral line system

C.

dorsal fins

D.

clawed digits

25.

Birds are able to fly because they have

A.

hollow bones

B.

web legs

C.

tail feathers

D.

flat chest

26.

Trees in desert regions have thick barks which enables them to

A.

prevent heat loss

B.

absorb more light

C.

prevent water loss

D.

absorb more water

27.

Which of the following activities of man causes both air and water pollution?

A.

Afforestation

B.

Construction of houses

C.

Construction of roads

D.

Deforestation

28.

The shedding of leaves by plants during the dry season protects them against

A.

bush fire

B.

cold weather

C.

plant-eating animals

D.

heat loss

29.

Which of the following pairs of organisms are decomposers?

A.

Animals and bacteria

B.

Animals and fungi

C.

Bacteria and plants

D.

Bacteria and fungi

30.

Which of the following features in plants are used for defence?

A.

Buds

B.

Leaf spines

C.

Pitchers

D.

Roots

31.

The ability of birds to fly depends on

A.

Their hollow hones only

B.

Their flight feathers only

C.

Their feathers covering their bodies

D.

Their hollow bones and flight feathers

32.

Which of the following substances is a pollutant?

A.

Domestic waste

B.

Fog

C.

Nitrogen

D.

Oxygen

33.

The food chain that occurs in nature is

A.

green plans → lizards → insects → snakes

B.

grasshopper → green plants → lizards → hawks

C.

green plants → snakes → hawks → man

D.

green plants → grasshopper → lizards → snakes

34.

Which of the following statements about mammals is true?

A.

They have hairs

B.

They lay eggs

C.

They have feathers

D.

They have beaks

35.

Desert plants shed their leaves to reduce the rate of

A.

absorption of minerals.

B.

diffusion.

C.

osmosis.

D.

respiration.

36.

The main pollutant from domestic fires is

A.

carbon monoxide.

B.

sulphur dioxide.

C.

water vapour.

D.

oxygen.

37.

Tendrils in plants are adaptations that enable the plant to

A.

climb.

B.

expire.

C.

store food.

D.

reproduce.

38.

A beak and claws are protective structures of a

A.

crab.

B.

hawk.

C.

lion.

D.

snake.

39.

Human beings are omnivorous because they eat

A.

both cooked and raw food.

B.

only flesh.

C.

only fruits.

D.

both plants and animals.

40.

Animals depend on plants for food because

A.

animals do not need to drink water.

B.

only plants can make their food from simple substances.

C.

only plant food can satisfy animals.

D.

plants are available everywhere.

41.

Which of the following animals has a body temperature which changes with the temperature of the surroundings?

A.

Butterfly

B.

Crow

C.

Rabbit

D.

Toad

42.

Which of the following arrangements is a probable food chain.

A.

Grass → Grasshopper → Toad → Snake → Crow

B.

Grasshopper → Grass → Goad → Lion → Man

C.

Crow → Snake → Toad → Grasshopper → Grass

D.

Grass → Goat → Lion → Man → Snake

43.

The major cause of pollution at a stone quarry is

A.

dust.

B.

human waste.

C.

acid disposal.

D.

smoke.

44.

The lion is a carnivore because it eats

A.

flesh.

B.

grass.

C.

fruits.

D.

uncooked food.

45.

The structure which helps a fish to breath under water is the

A.

gill.

B.

air sac.

C.

operculum.

D.

mouth.

46.

The thorns found on some plants are used for

A.

breathing.

B.

protection.

C.

absorbing water from the air.

D.

resisting bush fires.

47.

The greatest danger faced by mammals living on land is

A.

becoming too cold.

B.

becoming too hot.

C.

losing water through evaporation.

D.

gaining too much water through absorption.

48.

An omnivore is an animal that feeds on

A.

raw food.

B.

fresh foods.

C.

cooked foods.

D.

all kinds of food.

49.

A fish is able to swim with little resistance in water because it has

A.

fins.

B.

gills.

C.

a streamlined body.

D.

the ability to make use of a limited oxygen supply.

50.

Producers in an ecosystem are plants that

A.

feed on other plants.

B.

feed on dead materials.

C.

manufacture their own food.

D.

attract insects.

51.

Which of the following human activities pollutes the environment?

I. Release of cement dust into the atmosphere
II. Dumping of refuse into water bodies
III. Burning of rubbish

A.

I and II only

B.

II and III only

C.

I and III only

D.

I, II and III

52.

Which of the following substances is an air pollutant?

A.

Water vapour

B.

Oxygen

C.

Nitrogen

D.

Hydrogen sulphide

53.

Some plants shed their leaves during the dry season to prevent

A.

water loss.

B.

heat loss.

C.

catching fire.

D.

losing nutrients.

54.

Which of the following organisms is at the beginning of a food chain?

A.

Fish

B.

Grass

C.

Locust

D.

Mosquito

55.

Which of the following organisms is likely to increase the oxygen content of the water in a pond?

A.

Fish

B.

Tadpole

C.

Mosquito larva

D.

Water lily

56.

Which of the following substances causes acid rain when released into the atmosphere?

A.

Carbon dioxide

B.

Water vapour

C.

Sulphur dioxide

D.

cement dust

57.

Which of the following statements about bush fires is/are true?

I. They cause air pollution
II. They deplete vegetation cover
III. They contribute to global warming

A.

I only

B.

II only

C.

II and III only

D.

I, II and III

58.

All the living and non-living things that surround an organism constitute its

A.

community.

B.

ecosystem.

C.

environment.

D.

habitat.

59.

Producers in an ecosystem are plants that

A.

attracts insects.

B.

feed on other plants.

C.

manufacture their own food.

D.

trap insects.

60.

One way of ensuring that organisms are not endangered is to

A.

allow them to be hunted.

B.

allow their predators to outnumber them.

C.

protect their habitats.

D.

pollute their habitats.

61.

A place where an organism can live and interbreed successfully is called

A.

community.

B.

ecosystem.

C.

environment.

D.

habitat.

62.

Producers in an ecosystem are plants that

A.

attract insects

B.

feed on other plants

C.

feed on dead materials

D.

manufacture their own food

63.

Fish swims in water with little resistance because it possesses

A.

gills.

B.

scales.

C.

caudal fins.

D.

streamlined body.

64.

Which of the following members in a food chain will receive the least energy?

A.

Lizard

B.

Grass

C.

Grasshopper

D.

Hawk

65.

A food web shows how

A.

food produce by plants is distributed to other parts of the plant.

B.

an organism protects itself in its environment.

C.

organisms depends on one for shelter.

D.

food produced by green plants is distributed among organisms in a community.

66.

The structure which enables a fish to breate in water is

A.

buccal cavity

B.

gills

C.

swim bladder

D.

lungs

67.

The interaction in which one species benefits and other is neither harmed nor benefited is termed as ......

A.

Mutualism

B.

Parasitism

C.

Communism

D.

Commensalism

68.

In a food chain, secondary producers are ......

A.

omnivores

B.

herbivores

C.

carnivores

D.

decomposers

69.

...... is a community where living organisms interact among themselves and also with the surrounding physical environment.

A.

Family

B.

A universe

C.

An ecosystem

D.

A herd

70.

Many animals in the Arctic and high mountain regions have thick fur and layer of fat under their skin. What is the primary purpose of this adaptation?

A.

To help them blend into the rocks.

B.

To protect them from being eaten by predators.

C.

To keep their bodies warm in cold, harsh conditions.

D.

To allow them to swim faster.

71.

How does camouflage, such as a chameleon changing color or a desert fox blending with sand, help an animal survive?

A.

It makes them faster.

B.

It helps them stay warmer.

C.

It helps them avoid predators or hide from prey.

D.

It helps them find water.

72.

In a grasslands ecosystem, how do grazing animals like zebras survive in a place with little cover?

A.

They burrow underground.

B.

They live in large herds for protection.

C.

They hibernate for most of the year.

D.

They climb trees to escape predators.

73.

Which of the following is a structural adaptation that helps birds thrive in a mountainous environment?

A.

Short, weak wings.

B.

Long legs for running.

C.

A streamlined body for powerful flight.

D.

No feathers.

74.

What is the definition of an adaptation?

A.

A change in weather patterns.

B.

A characteristic that helps an animal survive and reproduce in its environment.

C.

The process of moving to a new habitat.

D.

The death of a species.

75.

Why do many desert animals, like the Fennec Fox, have very large ears?

A.

To help them hear predators from miles away.

B.

To help them dig for food.

C.

To release body heat and stay cool.

D.

To cover their eyes during sandstorms.

76.

Mountain goats and sheep have specialized hooves that allow them to climb steep, rocky slopes. This is an example of what?

A.

Behavioral adaptation

B.

Physical/Structural adaptation

C.

Camouflage

D.

Nocturnal behavior

77.

Which of the following adaptations is most useful for a predator living in a vast, open grassland?

A.

Long legs for running to catch prey.

B.

Small, stunted legs for hiding.

C.

Webbed feet for swimming.

D.

A thick, heavy shell.

78.

Desert animals, such as rats and snakes, often spend their days in deep, cool burrows and come out only at night. What type of adaptation is this?

A.

Physical Adaptation

B.

Structural Adaptation

C.

Behavioral Adaptation

D.

Reproductive Adaptation

79.

A camel has large, flat feet. How does this structural adaptation help it survive in a desert landform?

A.

It helps them swim across rivers.

B.

It allows them to walk on soft sand without sinking.

C.

It helps them climb rocky mountains.

D.

It keeps their feet warm during cold nights.

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