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 / Caffeine content (mg per 100ml)
Cocoa cola / 10
Coffee / 29
Tea / 22
Irn Bru / 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)

  1. Name 2 possible methods of pollination used by flowering plants.

______(1)

  1. 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)