ICSE Class X Biology 2016 Solved Papers

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The diagram of an apparatus given below demonstrates a particular process in plants. Study the same and answer the questions that follow :
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Question : 50
Total: 93
State two limitations of using this apparatus.
Solution:  
Two limitations :
1. The small twig can not remain alive for a long time.
2. Introducing a single air bubble is practically very difficult.
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