Jalal finds a group of organisms in the school grounds. The diagram below shows the organisms he finds. Jalal makes a table to record the characteristics of the organisms he finds. Name of organism Number of legs Number of wings Stick insect 6 0 Jumping-spider Meal moth Hoopoe bird Use the diagrams to complete the table. The first one has been done for you.

Name of organism Number of legs Number of wings Stick insect 6 0 Jumping spider 8 0 Meal moth 6 4 Hoopoe bird 2 2 Like any insect, stick insects have six legs, two antennae and their body is divided in three segments; head, thorax and abdomen. Jumping spiders are small and scrappy carnivores. Jumping spiders have 8 legs. Indian meal moth has hind wing that is broader than the front wing and fringed with long hair-like scales. Hoopoe has rounded wings with conspicuous black and white barring. This bird performs powerful flight with slow wing-beats. The flight is undulating, performed over short distances, from perch to perch.

Name of organism Number of legs Number of wings Stick insect 6 0 Jumping spider 8 0 Meal moth 4 4 Hoopoe bird 2 2 Jalal uses the information in this table to construct a classification key. Complete the key by writing the missing question:

Jalal uses the information in the table to construct a classification key. Stick insect, meal moth and jumping spider belong to the phylum Arthropoda. Hoopoe bird belongs to Class Aves, they have a distinctive crown of feathers on their head. All these animals belong to Kingdom Animalia. Only the Hoopoe bird is a vertebrate, all other animals are invertebrates.

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Earn 100

Explain why identical twins look alike.

Important Questions on Variation and Inheritance

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 1

characteristics

height

invertebrates

kingdoms

species

Living organisms can be classified according to their _____.

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 1

Characteristics height invertebrates kingdoms species

Organisms are classified into large groups called _____ such as 'animal', plant' and 'fungi'.

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 5

Why do scientists use classification keys?

HARD

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 7

Jalal finds a group of organisms in the school grounds. The diagram below shows the organisms he finds.
Question Image
Jalal makes a table to record the characteristics of the organisms he finds.

Name of organism	Number of legs	Number of wings
Stick insect	$6$	$0$
Jumping-spider
Meal moth
Hoopoe bird

Use the diagrams to complete the table. The first one has been done for you.

HARD

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 7

Name of organism	Number of legs	Number of wings
Stick insect	$6$	$0$
Jumping spider	$8$	$0$
Meal moth	$4$	$4$
Hoopoe bird	$2$	$2$

Jalal uses the information in this table to construct a classification key. Complete the key by writing the missing question:
Question Image

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 7

Construct the classification key:
Question Image

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 1>Q 8

Viruses cannot reproduce without invading a 'host cell'. Viruses are not put into any kind of kingdoms. Explain why.

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Workbook>Chapter 4 - Variation and Inheritance>Exercise 4>Q 6

Lemmings are furry rodents naturally found in the Arctic tundra. In

1800

a population of lemmings was taken from the Arctic to an area with a warmer climate. The lemmings were left to live and reproduce in the new area. The population of lemmings was revisited

200

years later. Some information about the lemmings is shown in the table:

Year	Average fur length of lemming(mm)
$1800$	$12$
$2000$	$8$

Explain how Darwin's theory of natural selection can explain this change.

Explain why identical twins look alike.

Important Questions on Variation and Inheritance

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