9700/11 Biology May Jun 2011 Online Test | Cambridge AS and A Level MCQ
CIE
AS & A Level
Biology (9700)
شهریور
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
Single-celled animals that live in fresh water have a vacuole that contracts regularly to remove excess water. Single-celled plants that live in fresh water do not have a similar vacuole.
Which statement explains why only these animals need this vacuole?