9700/13 Biology May Jun 2020 Online Test | Cambridge AS and A Level MCQ
CIE
AS & A Level
Biology (9700)
شهریور
2020
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Neda Bani One control method to reduce the spread of malaria is to use an insecticide. It can be used to treat mosquito nets.
Another control method is to completely cover areas of water with insoluble polystyrene balls that float on the surface.
Using this information, what are the reasons for these control methods?
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