Paper 1 October/November 2007 BIOLOGY (0610/01) IGCSE
Cambridge
IGCSE
Biology (0610)
بهمن
2007
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه
پیش نمایش صفحه اول فایل
Danial Naderi A species of insect usually has pale-coloured wings. This helps to camouflage them on pale-coloured tree trunks. A few of the insects in this species have darker coloured wings.
After a number of years the tree trunks become darker in colour due to environmental changes. The insects with dark-coloured wings become more common than insects with pale-coloured wings in this species. Which process causes this change in the proportion of insects with dark-coloured wings?
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