9700/11 Biology Oct Nov 2011 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
بهمن
2011
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
Which of the following statements explain why a stem is both cut and connected to a potometer under water?
1 To prevent plasmolysis of xylem vessel elements
2 To prevent the collapse of xylem vessel elements
3 To prevent air entering xylem vessel elements