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| Question | Answer |
| Complete the sentence: Some populations of mosquito have evolved resistance to... | The pesticide DDT |
| Complete the sentence: Some populations of pollen beetles (which damage oilseed rape) are resistant to... | Pyrethroid pesticides |
| Outline the evolution of pesticide resistance | 1. There is variation in a population of insects. Genetic mutations make some insects naturally resistant to a pesticide 2. If the population of insects is exposed to that pesticide, only the individuals with resistance will survive to reproduce 3. The alleles which cause pesticide resistance will be passed on to the next generation. Over many generations, the populations will evolve to become more resistant to the chemical |
| Why might pesticide resistance be bad for humans? | If the insects are resistant to specific pesticides, farmers might have to use broader pesticides, which could kill beneficial insects. If disease-carrying insects become pesticide-resistant, the spread of disease could increase |
| What could be done to tackle the problems associated with pesticide resistance? | A population of insects could also evolve resistance to all pesticides in use. To prevent this, new pesticides need to be produced which takes time and costs money. |
| Complete the sentence: Some of the ____________ that cause malaria are ____________ to several drugs used to treat malaria. Evolution of ___________ resistance in many species of bacteria e.g. __________. | Some of the PROTOCTISTS that cause malaria are RESISTANT to several drugs used to treat malaria. Evolution of ANTIBIOTIC resistance in many species of bacteria e.g. MRSA |
| What are the implications of drug resistance for humans? | It can take doctors a while to figure out which drugs will get rid of the infection, and in that time the patient could become very ill or die. There could come a point where a pathogen has become resistant to all the drugs we currently use against it. |
| What could be done to tackle the problems associated with drug resistance? | To prevent the implications of drug resistance, new drugs need to be developed which takes time and costs a lot of money |
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