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Unit 6: Being a Biologist

Homework

S1/2 CfE Science

Homework Date

due

Parent/Guardian

Signature Mark

1 – DNA & Chromosomes /10

2- Reproduction in animals /12

3- Fetal development /8

4- Reproduction in plants /12

5- Photosynthesis /14

6- Limiting factors /8

7- Respiration /11

8- Sampling /9

9 - Biodiversity /17

Parental Comments

1

1. Fill in the blanks

a. Chromosomes are found in the ____________ of the cell 1

b. Chromosomes contain ________and are made of _______ 1

2. What is the full name for DNA?

______________________________________________ 1

3. How many strands does DNA have?

_____________________________ 1

4. State what the 4 DNA bases are and write them next to their

partner

_____ & _____

_____ & _____ 1

5. Genes are the code for what?

______________________________________________ 1

6. How many chromosomes are in normal human cells?

___________________ 1

Homework 1 MARK /13 % Comment / Grade

Find out more....

2

7. Circle the letter which has the correct statement.

The diagram below shows parts of an animal cell.

Where is the DNA found in this cell? 1

8. The diagram below shows a yeast cell

a. Name the structure in the yeast cell which contains

the genetic information

__________________________________ 1

b. A molecule consisting of chains of bases is contained in

chromosomes

Name this molecule

_____________________ 1

3

1. Fill in the blanks

a. _______________ are required for reproduction

b. ________________ are the male sex cells

c. ________________ are the female sex cells 3

2. Where are eggs produced?

____________________________________ 1

3. Where does fertilisation take place in humans?

____________________________________ 1

4. Where will the fertilised egg grow?

____________________________________ 1

5. What do the testes produce?

____________________________________ 1


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4

6. Where does the sperm travel along from the testes and into the

penis?

____________________________________ 1

7. What is the definition of fertilisation?

____________________________________

____________________________________ 1

8. The diagram below represents the female reproductive system.

In which of the named structures would the following take place?

a. Fertilisation

_______________________

b. Development of the fetus

_______________________ 1

5

9. Decide if each of the following statements is TRUE or FALSE

and tick the appropriate box.

If the statement is FALSE write the correct word in the

correction box to replace the word underlined in the statement.

1

10. Circle the letter which has the correct statement

The diagram below shows a stage in the process of reproduction

Process W is

A Gamete production

B Reproduction

C Fertilisation

D Pollination

1

6

1. Use your summary notes to answer the following

questions about the stages of pregnancy

a. State in which month of pregnancy that the bones are

hardening in the foetus and state the length of the

foetus is at this stage.

Month_____________ Length_____________ 1

b. In which month is the embryo officially known as a

foetus and what size is the foetus at this stage?

Month_____________ Size________________ 1

Research task

On the next page create a fact sheet for pregnant women detailing 2

vitamins or minerals that they should take to ensure healthy growth

of the foetus

You must give details of what food these vitamins/minerals can be

found and why they are necessary for healthy growth of the foetus

Success criteria: in your own words

You have stated the names of the 2 vitamins/minerals

You have stated what foods they’re found in and why they are

necessary for healthy growth of the fetus 6


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8

1. What is the male part of the flower called?

_____________ 1

2. What is the male sex cell in plants? 1

_____________

3. What is the female part of the flower called?

_____________ 1

4. What is the female sex cell in plants?

_____________ 1

5. What is the definition of fertilisation in plants?

_________________________________________

_________________________________________ 1


Find out more....

9

Circle the correct letter which has the correct statement

6. The diagram below shows structures present in a flower

Which line in the table identifies part X and the type of

gamete it produces?

Name of X Type of gamete produced

A anther female

B anther male

C ovary female

D ovary male

1

7. The diagram below represents a section through a flower

1

Use the letters from the

diagram to identify the

following:

a. The part containing the

female sex cell_____

b. The part containing the male

sex cell_____

10

8. The diagram below shows the main parts of a flower

Which line in the table identifies part X and the type of

gamete it produces?

Name of X Type of gamete produced

A anther female

B anther male

C ovary female

D ovary male

1

9. Which line in the table identifies correctly the male gametes

and the site of its production in the flowering plant?

Male gamete Type of gamete produced

A sperm testes

B pollen nucleus anther

C sperm anther

D pollen nucleus testes

1

11

10.

a. Name sex organs A and B

A _______________________

B _______________________ 1

b. Name process X, which involves the fusion of the

gametes

_____________________________________ 1

c. Name cell Y.

___________ 1

12

1. Give 2 reasons why plants are vital for life on earth

Reason 1 ________________________________________

Reason 2 ________________________________________ 1

2. Why are green plants green?

_________________________________________ 1

3. What is the name of the process by which green plants make their

own food?

_________________________________________ 1

4. What is it in plants that traps the light energy used in

photosynthesis?

_________________________________________ 1

5. Can you remember from first year where in the cell

photosynthesis occurs?

_________________________________________ 1


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6. What 3 things can a plant use glucose for?

______________________________________________

______________________________________________

______________________________________________ 1

7. Photosynthesis is the process by which green plants make glucose

using energy from the sun.

a. Name the by-product A released during photosynthesis

_______________________________________ 1

b. During photosynthesis, light energy is used

Where is light energy trapped in the cell?

_______________________________________ 1

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8. The sentences below give some information about photosynthesis.

Underline one option in each set of brackets to make the

sentences correct.

Photosynthesis uses b to allow to

make their own food

Some of this food is converted to for making cell walls.

1

9. Name the carbohydrate produced during photosynthesis

_________________________________________ 1

10. Name the substance formed by plants to store the

carbohydrate produced during photosynthesis

_________________________________________ 1

carbon dioxide

oxygen

fungi

green plants { { } }

cellulose

starch { }

15

11. An experiment was set up to measure the effect of light

intensity on the rate of photosynthesis in the water plant, Elodea.

The light intensity was varied using a dimmer switch on the lamp.

The rate of photosynthesis was measured by counting the number

of bubbles released per minute.

a. Name the gas collected

______________________ 1

b. What raw material needed for photosynthesis is not

shown in the diagram?

______________________ 1

c. Complete the word equation for photosynthesis

water + __________ + energy glucose + ____________ 1

16

1. Circle the letters which have the correct statement

Which of the following conditions in a greenhouse would produce

earlier crops?

A Glass shading

B Cool air conditioning

C Additional oxygen

D Additional carbon dioxide 1

2. Other than temperature, state two other limiting factors for

photosynthesis.

Factor 1 ____________________________

Factor 2 ____________________________ 1

The following questions contain graphs obtained from experiments

investigating photosynthesis.


Find out more....

REMEMBER THE RULES – IF IT IS ON THE LINE ON THE

WAY UP IT IS WHATEVER IS ON THE X-AXIS. IF IT IS

ON THE LINE WHEN IT’S LEVELLED OFF IT MUST BE ONE

OF THE OTHER 2 – LOOK FOR WHAT ONE IS LOWEST!

17

3. The graph shows the effect of varying the light intensity,

temperature and carbon dioxide on the rate of photosynthesis.

The rate of photosynthesis is being limited by

A temperature at S and light intensity at T

B light intensity at S and temperature at T

C carbon dioxide at S and temperature at T

D light intensity at S and carbon dioxide at T 1

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4. The graph below show the effects of two different environmental

factors on the rate of photosynthesis

What are the limiting factors at positions X and Y?

X _____________________ 1

Y _____________________ 1

5. The graph below shows how light intensity affects the rate of

photosynthesis under different conditions

19

Use the information from the graph on the previous page to complete

the table below.

Tick () one box in each row to indicate the factor that is limiting

the rate of photosynthesis at points A, B and C

Graph point Light intensity CO2 concentration Temperature

A

B

C

1

6. The following graph shows the effect of increasing carbon dioxide

concentration on the rate of photosynthesis at two different

temperatures. All other factors were kept constant.

From the evidence in the graph, what are the limiting factors at

points X and Y?

X _______________________ 1

Y _______________________ 1

20

1. What is respiration?

_____________________________________________ 1

2. Write the word equation for respiration

________ + _______ _______ + ________ + _________ 2

3. What must be present for aerobic respiration to occur?

_______________ 1

4. Oxygen moves into muscle cells for respiration.

a. Name one other raw material needed for respiration that

enters muscle cells

_____________________________ 1

b. Name a waste product of respiration that moves out of

muscle cells

_____________________________ 1


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21

5. Decide if each of the following statements is TRUE or FALSE and

tick the appropriate box.

If the statement is FALSE write the correct word in the correction

box to replace the word underlined in the statement.

1

6. Circle the letters which have the correct statement

1

22

7. The following experiment was set up

1

This is a challenge!!!

The following questions show a Respirometer. The Respirometer

measures the rate of respiration. The germinating peas are using

oxygen and producing carbon dioxide. The carbon dioxide produced is

absorbed by the chemical at the bottom of the test tube. This means

as the peas are using up the oxygen the coloured liquid will be ‘sucked’

up the tube.

The more respiration that occurs – the higher the coloured liquid will

rise.

23

8. The apparatus below was used to investigate gas exchange in

germinating peas

The movement of the coloured liquid in the capillary tube can be

used to measure the volume of

A oxygen produced by respiration

B carbon dioxide used up by respiration

C oxygen used up by respiration

D carbon dioxide produced by respiration. 1

24

9. The apparatus below was used to investigate gas exchange in

germinating peas

A suitable control for this experiment would be:

` 1

25

1. Why is sampling an ecosystem necessary?

_________________________________________

_________________________________________ 1

2. Name 3 Biotic factors.

Factor 1 __________________________________________

Factor 2 __________________________________________

Factor 3 __________________________________________ 1

3. Light is an Abiotic factor which can be measured using a light meter.

Name the other 3 Abiotic factors and state how each can be

measured.

Factor 1 _______________ Measured using ______________

Factor 2 _______________ Measured using ______________

Factor 3 _______________ Measured using ______________ 1

4. How can we sample plants (or slow moving insects)?

_________________________ 1


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5. How can we sample fast moving insects?

________________________ 1

6. Tree beating can be used to sample small animals living on a tree.

What is a possible error of tree beating and state how this problem

can be overcome?

Possible error ______________________________

Solution ___________________________________ 1

7. Abiotic factors can affect the community of seaweeds that

grow on a rocky shore

Identify two abiotic factors from the list below:

Tick () the correct boxes

temperature

light intensity

competition

competition

grazing limpets

1

8. What sampling technique could be used to estimate the number

of woodlice in an area?

___________________________________________ 1

27

9. A quadrat was used to sample four species of plants growing in a

field. The abundance of each plant species was measured by counting

the number of squares of the quadrat which contained that species.

The diagram below shows the species found in one throw of the

quadrat.

Complete the following table to show the abundance of the four

plant species found in the quadrat.

One result has been completed for you.

Plant species Abundance

Daisy 10

Dandelion

Plantain

Buttercup

1

28

1. What 5 factors affect biodiversity?

Factor 1 ______________________

Factor 2 ______________________

Factor 3 ______________________

Factor 4 ______________________

Factor 5 ______________________ 1

2. Where does the greatest biodiversity in the world exist?

____________________________________ 1

3. Some features of common seaweeds are shown in the table below


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29

Use the information in the table on the previous page to

complete the key below by correctly writing the correct

feature on each dotted line and the correct seaweed names

in the empty boxes

3

30

4. The key below gives information about some water plants growing

in a pond.

1 Plant is fully submerged in water…..Go to 2

Plant has leaves on or above the surface …..Go to 3

2 Grows in deep water…..Elodea

Grows in shallow water…..Starwort

3 Plant has roots in soil…..Go to 4

Plant is free floating on water surface…..Water hyacinth

4 Long and thin leaves…..Water hawthorn

Round leaves…..Go to 5

5 Resistant to frost…..Water lily

Cannot survive frost…..Lotus

a. Use the key to identify the plant from the picture below and

its description

Name of plant _________________________ 1

b. Which plant grows submerged in deep water?

____________________________________ 1

The plant has its roots in

the soil at the bottom of

the pond and does not

tolerate frost very well.

31

c. Give three features that the Water lily and the Lotus

have in common.

1. ____________________________

2. ____________________________

3. ____________________________ 2

5. The key below can be used to identify species of trees from the

shape of their leaves

32

The diagrams below show one leaf from two different species

of tree.

a. Use the key on the previous page to identify Leaf A

and leaf B

Leaf A ____________ Leaf B ____________ 1

b. Use the key to describe an oak leaf

_______________________________________

_______________________________________ 1

33

6. Some features of five varieties of daffodils are shown in the table

below

a. Use the information in the table to complete the key below by

writing the correct feature on each dotted line and the

correct names in the empty boxes

2

34

b. Give three features of the American Dream daffodils

1. _________________________________

2. _________________________________

3. _________________________________ 1

c. Describe one difference between Ice Follies and Barrett

Browning daffodils

___________________________________

___________________________________ 1

7. The table blow gives information about some common garden

flowering plants

a. Use the information from the table to complete the key on

the next page by writing the correct feature on each dotted

line and the correct names in the empty boxes

35

1

b. Which feature could be used to distinguish between

Snapdragon and Sunflower plants?

___________________________________ 1

unit 3: being a biologist - smarshallsay.weebly.com · unit 6: being a biologist homework s1/2 cfe...

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