ICSE Class X Biology 2013 Solved Papers

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Differentiate between the following pairs on the basis of what is mentioned in brackets :
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Question : 57
Total: 90
Bicuspid valve and Tricuspid valve. (Function).
Solution:  
 Bicuspid valve  Tricuspid valve.
 It closes the opening of auriculo-ventricular valves when blood rushes from left auricle into left ventricle.  It closes the opening of auriculo-ventricular valves when blood rushes from right atrium to right ventricle.
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