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ICSE Class X Biology 2018 Papers

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Choose between the two options to answer the question specified in the brackets for the following :
An example is illustrated below.
Example: Corolla or Calyx (Which is the outer whorl?)
Answer : Calyx
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Question : 21 of 97
Marks: +1, -0
Sclerotic layer or choroid layer (Which one forms the Iris?)
Solution:  
Choroid layer
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