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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
Homework 2 MARK /13 % Comment / Grade
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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
Homework 3 MARK /13 % Comment / Grade
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7
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
Homework 4 MARK /13 % Comment / Grade
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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
Homework 5 MARK /13 % Comment / Grade
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13
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
14
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.
Homework 6 MARK /13 % Comment / Grade
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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
18
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
Homework 7 MARK /13 % Comment / Grade
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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
Homework 8 MARK /13 % Comment / Grade
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26
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
Homework 9 MARK /13 % Comment / Grade
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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
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