B1, Chapter 6
Name …………………………………………………….………… Class …………………………..
1 Strawberries are able to reproduce many plants from one parent plant.
Choose the correct answer to complete each sentence. a Producing new plants with one parent is called .................... (1) asexual reproduction genetic engineering sexual reproduction b The advantage of this is that all the strawberry fruits will .................... (1) be bigger all taste better all taste the same c A disadvantage of this to the strawberry plants is that .................... (1) there is more variation they are genetically identical they cannot mate
2 Read the passage. Use the information and your own knowledge to answer the questions.
At one time, the boll weevil destroyed cotton crops. Farmers sprayed the crops with a pesticide.
The weevil died out but another insect, the bollworm moth, became resistant to this pesticide.
In the 1990s large crops of the cotton plant were destroyed by the bollworm moth. The pesticides then used to kill the moth were expensive and very poisonous, resulting in deaths to humans.
Scientists investigated alternative ways to control the bollworm moth. They found out that a type of bacterium produced a poison which killed bollworm larvae (grubs).
A GM cotton crop plant was developed which produced the poison to kill bollworms.
This proved to be very effective and farmers were able to stop using pesticide sprays.
Now farmers have another problem. Large numbers of other insects have multiplied because they were not killed when the farmers stopped using pesticides. Some of these insects have started to destroy the GM cotton and farmers are beginning to use pesticides again! a i Give one advantage of spraying crops with pesticides.
................................................................................................................................... (1) ii Give two disadvantages of spraying crops with pesticides.
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B1, Chapter 6
Name …………………………………………………….………… Class …………………………..
................................................................................................................................... iii Give one economic advantage of using GM cotton.
................................................................................................................................... (1) iv Some people object to using GM crops. Suggest one reason why.
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b In this question you will be assessed on using good English, organising information clearly and using specialist term where appropriate.
The GM cotton was genetically engineered to produce the same poison as the bacterium.
Describe fully how this is done
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B1, Chapter 6
Name …………………………………………………….………… Class …………………………..
3 The use of cloned animals in food production is controversial.
It is now possible to clone ‘champion’ cows.
Champion cows produce large quantities of milk. a Describe how adult cell cloning could be used to produce a clone of a
‘champion’ cow.
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................................................................................................................................... (4) b Read the passage about cloning cattle.
The Government has been accused of ‘inexcusable behaviour’ because a calf of a cloned American ‘champion’ cow has been born on a British farm.
Campaigners say it will undermine trust in British food because the cloned cow’s milk could enter the human food chain.
But supporters of cloning say that milk from clones and their offspring is as safe as the milk we drink every day.
Those in favour of cloning say that an animal clone is a genetic copy. It is not the same as a genetically engineered animal. Opponents of cloning say that consumers will be uneasy about drinking milk from cloned animals.
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B1, Chapter 6
Name …………………………………………………….………… Class …………………………..
Use the information in the passage and your own knowledge and understanding to evaluate whether the government should allow the production of milk from cloned ‘champion’ cows.
Remember to give a conclusion to your evaluation.
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AQA, 2006
New AQA GCSE Science © Nelson Thornes Ltd 2011 4