本题目来源于试卷: SL/HL Topic D4.2 Stability and change，类别为 IB生物学
[问答题]
5. David Latimer created the mesocosm pictured below. It was last watered in 1972 and has been sealed ever since that date. It is still viable (living).[img]data/attachment/exam/2502/01/2502010209667685.jpg[/img]
a. Suggest why the md ;i24 asvijahf;4s5*ye z6qdesz;5*)ctnp c 1o 6g5+fy vvepmvocosm is persisting despite being sealed for over 50 yearsmcz; g p+vfvt55 c nv*1ep6o)y.
参考答案: Any two of these points for 2 marks:
Nutrients are being recycled / There are saprotrophic bacteria and fungi present.
There is a balance of organisms / stability of system / diversity of species.
Materials available are sufficient for the needs of the organisms present.
Light energy can enter the bottle.
本题详细解析:
暂无
| 
