National 5 Biology

Unit 3 – Life on Earth

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Teacher: ___________________________________

National 5

Unit 3: Life On Earth

Homework Booklet

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HW

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TOPIC MARK % COMMENT

1 Biodiversity and the dis-

tribution of life

9

2 Energy in Ecosystems

15

3

Sampling techniques,

and measurement of

abiotic and biotic factors

9

4 Adaptation, natural se-

lection

8

5 Human impact on the

environment 8

1— Biodiversity and the distribution of life

1.

2.

4.

3.

5.

5.

2—Energy in Ecosystems

1.

2.

3.

4.

5. The diagram below shows the number of organisms at each level in a pyramid of numbers.

How many organisms are consumers?

A 2

B 82

C 6000

D 6082

6.

6.

7.

3—Sampling techniques and measurement of

abiotic and biotic factors

1.

2.

3.

4. Some of the characteristics of five related British plants are shown in the table.

Use the information to answer questions 1 and 2.

Species Thorns Flower Colour Number of Petals

Pear No White Five

Silverweed No Yellow Five

Trailing Rose Yes White Five

Dog Rose Yes White tinged with

pink

Five

Common Tormentil No Yellow Four

KEY TO FIVE RELATED BRITISH PLANTS

Clue 1 Thorns present go to Clue 2

Thorns not present go to Clue 3

Clue 2 …………………………….Trailing Rose

…………………………….Dog Rose

Clue 3 5 petals present go to Clue 4

4 petals present …………...Tormentil

Clue 4 …………………………….Pear

…………………………….Silverweed

Use the following paired statements to answer questions 1 and 2.

A White flowers

Yellow flowers

B White flowers

White flowers tinged with pink

C 4 petals

5 petals

D White flowers

Yellow flowers

1. Which is the correct pair of statements for Clue 2 ? _______

2. Which is the correct pair of statements for Clue 4 ? _______

1

1

4—Adaptation, natural selection and the

evolution of species

1.

2.

3.

3.

5—Human impact on the environment

1.

2.

3.

4.

4.