Cells and Reproduction
Homework 1
1. Read the following passage carefully.
Adapted from ‘’Stirring Stuff’s in the bag’’, The Herald, April 2002.
Pausing for a cup of tea is a good way to take time out in a busy day. About 135 million cups are
consumed in Britain daily.
Favourite ‘’cuppas’’ include first thing in the morning before getting ready for work, during a busy
day and at the end of the day to relax. Relaxation is the most common mood when taking a tea
break.
As well as relieving stress, tea can also be a life-saver. Research has shown that the great British
‘’cuppa’’ has disease-fighting capabilities. A cup of tea can have protective effects against cancer
and heart disease. A mixture of green and black tea rubbed on cancerous areas reduced cell growth.
Tests show that tea slows the development of lung cancers and some bowel cancers. It is also
thought to decrease the risk of cancer of the digestive system. Red tea from South Africa is rich in
antioxidants and free from tannin and caffeine which are found in many other teas.
The three basic types of tea, black, green and oolong, give rise to more than 3000 varieties, each
having its own distinct character. People are now trying different styles of teas such as organic, Chai
spice, decaffeinated, herbal and iced tea.
Answer the following questions, based on the above passage.
a) How much tea is drunk in Britain daily?
______________________________________________________________________(1)
b) What is the most common mood whilst drinking tea?
______________________________________________________________________(1)
c) Apart from cancer, what disease can tea help prevent?
______________________________________________________________________(1)
d) Name 3 types of cancer that tea may help prevent.
1 ______________________ 2_____________________ 3_____________________(1)
e) What 2 substances are not present in South African red tea?
_____________________________________________________________________(1)
f) Name 3 styles of tea, mentioned in the passage, that people are now trying.
1_______________________ 2_______________________ 3___________________ (1)
2. As well as being found in tea, caffeine is found in many other types of drink. This table
shows how much caffeine is in different drinks.
Name of drink
Cocoa cola
Coffee
Tea
Irn Bru
Caffeine content (mg per 100ml)
10
29
22
11
Show this information as a bar chart using the grid below.
Cells and Reproduction
Homework 2
1. Name the parts of the flower shown below.
(3)
2. Where in a flower are;
a) the male sex cells produced?________________________________________
b) the female sex cells produced?_______________________________________ (1)
3. Name 2 possible methods of pollination used by flowering plants.
______________________________________________________________________(1)
4. Fill in the missing words using the correct words from the wordbank.
Female
Stigma
Ovary
Transfer
Insects
Fruit
Pollen tube
Ovule
Anther
Style
Seed
Petals
Flowers that are pollinated by insects have bright_________________________ to
attract ___________________ to the flower. This can result in the _________________
of pollen from the ____________________ of one flower to the ___________________
of another. After pollination each pollen grain grows a _________________ _________
The male nucleus travels down and fuses with the _______________ nucleus in the
______________________ This develops into a _______________ and the ovary
develops into a __________________
(5)
Cells and Reproduction
Homework 3
1) Why do plants need to disperse their seeds to new places?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
__________________________________________________________________ (1)
2) Look at the following seeds. Fill in the table with appropriate headings to show how
the seeds are dispersed and what features help them to be dispersed in this way.
(5)
3) Alan wanted to find out if wind speed had any effect on how far a winged seed
travelled. He used an electric fan with variable speeds.
Fan Speed
Distance travelled (cm)
0
28
1
45
2
62
3
78
Present Alan’s results as a line graph.
(3)
What conclusion can Alan draw from these results?
________________________________________________________________________
________________________________________________________________________
_____________________________________________________________________ (1)
Cells and Reproduction
Homework 4
1) Look at this diagram of a cell. Is it a plant cell or is it an animal cell?
_____________________________________________________________________(1)
2) Fill in the table to show the parts of the cell and their functions.
Part
Name
Function
A
B
C
D
E
F
3) Name 3 ways in which plant cells are different from animal cells.
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
___________________________________________________________________(3)
Cells and Reproduction
Homework 5
1) The diagrams below show the male and female reproductive systems.
Complete the table with the correct names and functions.
Letter
Name
Function
A
B
C
D
E
F
G
(7)
2) What is the function of the amniotic fluid?
________________________________________________________________________
______________________________________________________________________(1)
3) Name a substance that can be passed from the mother to the foetus.
______________________________________________________________________(1)
4) Name a substance that can be passed from the foetus to the mother.
______________________________________________________________________(1)
Cells and Reproduction
Homework 6
1) Read the following passage carefully.
A few hours after birth, a human baby starts to suckle at the mother’s breast or from a bottle. The mother’s
milk contains every thing that the baby needs except iron. A store of this chemical element has already been
obtained from the mother’s bloodstream by the foetus during gestation. This supply lasts for a few months
after birth.
Bottle fed babies receive dried cow’s milk that has been altered in advance by the manufacturers since natural
cow’s milk contains more protein and less vitamin A and sugar than human milk. If strict hygiene is not
observed, bottle feeding can pass germs onto the baby. Human milk is free of germs and in addition contains
antibodies which defend the baby against disease. Dried cow’s milk lacks these antibodies.
The crying response in babies is present from birth. It consists of muscular activity, exaggerated breathing,
watering of the eyes and high pitched sounds. Almost all young mammals cry when insecure, frightened or in
pain. By crying the young animal signals to its parents that something may be wrong. If it continues to cry, the
parent will normally examine the young animal for sources of pain or injury.
Answer the following questions, based on the above passage.
a) Give TWO changes that manufacturers have to make to cow’s milk to make it suitable
for human babies.
________________________________________________________________________
______________________________________________________________________(1)
b) How does a human baby obtain iron in the first few months after birth?
______________________________________________________________________(1)
c) As well as containing exactly the right balance of foodstuffs, state TWO other ways in
which human milk is better than cow’s milk for babies.
________________________________________________________________________
______________________________________________________________________(1)
d) State THREE situations, given in the passage, that can make a baby cry.
______________________________________________________________________
______________________________________________________________________
_______________________________________________________________________
_____________________________________________________________________(2)
2) Look at the table below.
Name of Animal
Time between fertilisation and birth (months)
Hamster
0.5
Rabbit
1
Sheep
5
Chimp
7
Human
9
Elephant
20
a) Present this information as a Bar chart
(3)
b) Can you see a pattern in this information?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
_____________________________________________________________________(2)