1. a) Beef steak is a good source of
b) Arteries carry blood
away from the heart away from the lungs to the heart to the lungs
c) Children growing healthy bones need food containing
aluminium calcium fibre sulphate
d) Carbon dioxide passes from a fetus to the mother across the
amnion oviduct placenta uterus
e) From the soil, root hair cells can absorb
carbon dioxide glucose nitrates protein
f) An organism which is a fungus is a
mouse mushroom penguin plant
g) Our blood contains white blood cells whose main function is to
absorb water kill microbes transport glucose transport oxygen
h) Genes are found inside a cell in the
cell wall nucleus surface membrane vacuole
i) Cigarette smoke damages lungs by
causing cancer lowering blood pressure reducing breathing rate slowing the heart
j) The gas produced in aerobic respiration is
carbon dioxide glucose oxygen water
(10)
2. The diagram below lists a number of organs in the human body. Draw a line to join each organ to its function. The first one has been done for you.
Heart
eyes
kidney (4)
3. Every day, barn owls produce pellets which contain the undigested parts of their food. By examining the bones in the pellets, scientists can work out what the barn owls have been eating. In twenty-four days, a single barn owl ate:
(a) Which is the most commonly eaten animal?
(1)
(b) On average, how many animals were eaten each day?
(1)
(c) Recently, the size of the bank vole population has fallen sharply. What will be the likely effect on the barn owls? Give a reason for your suggestion.
Suggestion: (1)
Reason: (2)
(d) Each pair of barn owls has its own territory. How does this help the barn owls to survive?
(3)
4. Mrs Jones took part in an experiment to investigate the effects of alcohol on reaction time. When Mrs Jones saw a red light flash, she had to press a button quickly. A computer timed how long it took for Mrs Jones to respond.
Mrs Jones was in a group where everyone was given a drink with no alcohol in it. There were five other groups which were given different amounts of alcohol.
The results of the experiments are below.
(a) Plot these results on the graph below. The first point has been done for you.
(b) Add a title to your graph.
Title: (1)
(1)
(2)
(e) Reaction times can be very important when driving a car. Use the results of this experiment to write about the dangers of driving after drinking alcohol.
(2)
5. (a) Name and describe a habitat which you have studied at school.
(2)
(b) Describe how you studied one named organism in your habitat. Include details of how you sampled and counted the species .
(4)
(c) Draw a food chain which exists in your habitat. Use an arrow (-->) to link the stages in the food chain.
(3)
(d) How can your habitat be protected so that it will survive for many years in the future? Make two practical suggestions and give reasons for them.
Suggestion 1: (1)
Reason: (1)
Suggestion 2: (1)
Reason: (1)
6. The two dogs in the pictures below have been bred to carry out particular jobs. Blind people use the labrador retriever to help them to walk safely through busy streets. The toy poodle is a very popular pet dog.
(a) Suggest two characteristics which a labrador retriever puppy should have if it is to become a good guide dog for blind people.
1. (1)
Toy poodles are popular pets. A prize-winning toy poodle should be less than 25 cm at the highest point of its shoulders. It is a proud, very active and intelligent dog. Many of these characteristics are inherited by the offspring from their parents.
(b) Suggest how dog breeders produce prize-winning poodles.
(3)
(c) Describe a characteristic, shown in the pictures, which the wolf shares with dogs .
(1)
(d) Suggest and explain one reason why wolves live in groups.
(2)
(e) Suggest one reason why it is useful for wolves to communicate with each other by howling.
(1)
7.
(a) Why is the head such an im ortant part of the body?
(2)
(1)
(c) Sigmund was unable to move his hand up and down. Suggest a reason for this.
(2)