IGCSE O Level Biology Online Tests
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Herbicides O Level Biology MCQs: Questions and Answers PDF Download
Advantages of using pesticides include
- healthier crops
- better yield
- more food and profit for farmers
- all of above
Over a period of time, mosquitoes have developed resistance to
- dichlorodiphenyl trichloroethane (DDT)
- biochemical oxygen demand (BOD)
- dioxins
- eutrophication
Miscarriages in women may be due to intake of
- carbon dioxide
- polluted water
- water containing dioxins
- DDT
Physical, mental abnormalities and risks of cancer are increased due to
- dichlorophenyl trichloroethane (DDT)
- biochemical oxygen demand (BOD)
- dioxins
- greenhouse effect
IGCSE O Level Biology Practice Tests
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