Instead of platelets, the non-mammals possess clotting factor in.
A
Nucleated cells called thrombocytes
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B
RBC
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C
WBC
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D
Plasma
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Solution
The correct option is A Nucleated cells called thrombocytes Only mammals have Platelets. Non-mammals possess thrombocytes which are nucleated cells which have been shown to have a haemostatic function paralleling that of mammalian platelets.
So, the correct answer is 'Nucleated cells called thrombocytes'.