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Science questions, chapter 1
Nama / NameKelas / ClassTarikh / Date

Biodiversity

43 marks. Use Practice to check each answer as you go, or Exam to answer everything against the clock first.

Section A: objective questions

12 marks
Choose the best answer for each question.
1

Question 1

Which statement describes biodiversity?
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B
Biodiversity is the diversity of organisms: microorganisms, animals and plants (textbook p. 4).
For the teacher: Remembering, low difficulty, standard 1.1.1
Textbook p. 4
2

Question 2

Timber, bamboo and rattan are used to make furniture and musical instruments. This shows that biodiversity is important as
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C
Forest products such as timber, bamboo and rattan are raw materials for industries.
For the teacher: Understanding, low difficulty, standard 1.1.1
Textbook p. 5
3

Question 3

Which is an example of in situ conservation?
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D
In situ conservation preserves species within their natural habitat, such as national parks, permanent forest reserves and marine parks. Zoos and botanical parks are ex situ.
For the teacher: Understanding, medium difficulty, standard 1.1.2
Textbook p. 6
4

Question 4

Which of the following is an endemic species of Malaysia?
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A
The pitcher plant Nepenthes rajah lives only in a restricted habitat in Malaysia. Other endemic examples: rafflesia, leatherback turtle, Malayan tiger.
For the teacher: Remembering, low difficulty, standard 1.1.2
Textbook p. 6
5

Question 5

Which invertebrate has no legs but has a segmented body?
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A
An earthworm has no legs and its body is divided into segments. Snails and sea anemones have no legs and no segments; a spider has legs.
For the teacher: Remembering, low difficulty, standard 1.2.2
Textbook p. 8
6

Question 6

Which pair of animals both have more than three pairs of legs?
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D
Scorpion and prawn have more than three pairs of legs. Ant, cockroach and butterfly have three pairs; an earthworm has no legs.
For the teacher: Understanding, medium difficulty, standard 1.2.2
Textbook p. 9
7

Question 7

Which characteristic is shared by fish and amphibians?
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C
Both are poikilothermic and undergo external fertilisation. Only young amphibians have gills, amphibians have moist skin, and their eggs have no shell.
For the teacher: Understanding, medium difficulty, standard 1.2.2
Textbook p. 10
8

Question 8

An animal is poikilothermic, has scales and hard skin, breathes through lungs and lays eggs with a shell. To which group does it belong?
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B
These are the characteristics of reptiles, with internal fertilisation. Amphibians have moist skin; birds are homeothermic; fish breathe through gills.
For the teacher: Applying, medium difficulty, standard 1.2.2
Textbook p. 10
9

Question 9

A bat can fly like a bird but it is classified as a mammal. Which characteristic is the reason?
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C
Mammals give birth and nurse their young. Birds are also homeothermic, have wings and breathe through lungs, so these do not separate a bat from a bird.
For the teacher: Analysing, medium difficulty, standard 1.2.2
Textbook p. 11
10

Question 10

Which characteristics are found in a dicotyledon?
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B
Dicotyledons have two cotyledons, a tap root, leaves with network-like veins and a woody stem. Options A and D describe monocotyledons; plants that reproduce by spores do not make seeds.
For the teacher: Understanding, low difficulty, standard 1.2.2
Textbook p. 13
11

Question 11

Diagram 1 shows a dichotomous key for four animals, P, Q, R and S. Which animal is most likely to be Q?
Dichotomous key: has a backbone leads to couplet 2 (feathers: P; moist skin, no scales: Q); no backbone leads to couplet 3 (three pairs of legs: R; no legs, body not segmented: S)
Diagram 1
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D
Q has a backbone, so it is a vertebrate, and has moist skin without scales. That describes an amphibian, a frog. P (feathers) would be the eagle and R (three pairs of legs) the ant.
For the teacher: Applying, medium difficulty, standard 1.2.1
Textbook p. 14
12

Question 12

A student wants the first couplet of a dichotomous key to divide eagle, frog, snake and whale into two groups of two. Which pair of statements is the best?
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A
Poikilothermic: frog and snake. Homeothermic: eagle and whale. That is 2 and 2. All four have lungs and a backbone, so those statements do not divide them. Laying eggs divides them 3 and 1 (only the whale gives birth).
For the teacher: Analysing, high difficulty, standard 1.2.1
Textbook p. 14

Section B: structured questions

31 marks
Answer all questions. Write your answers in the spaces provided.
13

Question 13

Choose the importance of biodiversity shown by each situation.
[1 mark] (a)Rattan is used to make chairs and tables.
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Raw materials for industries
[1 mark] (b)Bees carry pollen from flower to flower and plants make fruits.
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Balance in nature
[1 mark] (c)Scientists study microorganisms to create new technology.
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Education
For the teacher: Remembering, low difficulty, standard 1.1.1
Textbook p. 5
14

Question 14

A conservation officer works to protect the leatherback turtle, an endemic species of Malaysia.
[1 mark] (a)What is an endemic species?
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Tick each point you got.
[2 marks] (b)State two ways to maintain and conserve endemic species.
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Any 2 points
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[1 mark] (c)Zoos preserve species outside their natural habitat. State the type of conservation.
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Ex situ conservation
Ex situ means outside the natural habitat, for example zoos and botanical parks.
For the teacher: Understanding, medium difficulty, standard 1.1.2
Textbook p. 6
15

Question 15

Diagram 2 shows a dichotomous key for five invertebrates.
Dichotomous key: no legs leads to couplet 2 (segmented body: earthworm; body not segmented: planaria); has legs leads to couplet 3 (three pairs of legs: butterfly; more than three pairs: couplet X, four pairs: spider, more than four pairs: centipede)
Diagram 2
[1 mark] (a)Which animal has no legs and a body that is not segmented?
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Tick each point you got.
[1 mark] (b)A cockroach has three pairs of legs. Which animal in the key is it grouped with?
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Tick each point you got.
[2 marks] (c)Spider and centipede are separated at couplet X. State one similarity and one difference between them.
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[1 mark] (d)Earthworm and planaria both have no legs. State the characteristic used to separate them.
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For the teacher: Applying, medium difficulty, standard 1.2.1
Textbook p. 14
16

Question 16

Table 1 shows the characteristics of four vertebrates, P, Q, R and S.
AnimalCharacteristics
PPoikilothermic, scales and hard skin, lungs, eggs with shell, internal fertilisation
QPoikilothermic, fins and tail, gills, scales, external fertilisation
RHomeothermic, feathers, lungs, wings, eggs with hard shell
SHomeothermic, hair, lungs, gives birth and nurses its young
[1 mark] (a)Name the group of animal P.
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Tick each point you got.
[1 mark] (b)Name the group of animal Q.
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[1 mark] (c)Name the group of animal R.
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[2 marks] (d)Name the group of animal S and state one feature that makes it different from R.
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For the teacher: Applying, medium difficulty, standard 1.2.2
Textbook p. 10
17

Question 17

Table 2 shows the characteristics of three plants.
PlantCharacteristics
XProduces flowers; seed has one cotyledon; fibrous roots; leaves with parallel veins
YProduces flowers; seed has two cotyledons; tap root; woody stem
ZNo flowers; reproduces by spores; has vascular system; true roots, stems and leaves
[1 mark] (a)State the group of plant X.
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Tick each point you got.
[2 marks] (b)State two differences between plant X and plant Y.
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Any 2 points
Tick each point you got.
[1 mark] (c)Name one example of plant Z.
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Tick each point you got.
[1 mark] (d)Moss is also non-flowering and reproduces by spores. State one way in which moss is different from Z.
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Tick each point you got.
For the teacher: Analysing, high difficulty, standard 1.2.2
Textbook p. 13
18

Question 18

A company wants to clear part of a forest to obtain timber and to build a factory.
[2 marks] (a)State two effects of clearing the forest on biodiversity.
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Any 2 points
Tick each point you got.
[1 mark] (b)Suggest one action the company can take to reduce the effect.
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Any 1 points
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[2 marks] (c)Deforestation helps the development of a country, yet it must be controlled. Justify.
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Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 1.1.2
Textbook p. 6
19

Question 19

Construct a dichotomous key to identify these four animals: eagle, bat, crocodile and frog. Write your key as numbered couplets, each with two statements.
[4 marks] (a)Write your dichotomous key.
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Tick each point you got.
For the teacher: Creating, high difficulty, standard 1.2.1
Textbook p. 14