本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
Figure: Two mesocosms for in v-s+7 i2tk3c1vu pc44ltfka5l f hd6dvestigating an aquatic food chain
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Identify the correct description for the mesocosms shown in the Figure.What is Mesocosm 1?What is Mesocosm 2?
A. Open system, can exchange energy but not matter ,Open system, can exchange matter and energy
B. Open system, can exchange both matter and energy, Closed system, can exchange energy but not matter C. Open system, can exch
C. Open system, can exchange matter and energy, Isolated system, cannot exchange energy or matter D.
D. Isolated system, cannot exchange energy or matter, Closed system, cannot exchange matter or energy
参考答案: B
本题详细解析:
The first ecosystem (Mesocosm 1) is open and can e. u7-y,f*ow- bsfhwwm hrt6k4pm; pl7xchange both matter and energy, the second ecosystem (Mesocosm 2) is closed and can exchange energy but not matter. Both systems can carry out photosynthw4pus* -y7hr6 f-k7.,otwmm b whlp; fesis in the presence of light.
Isolated systems cannot exchange energy or matter. It is a theoretical concept, the universe being a possible example.
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