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......... numbers of Ostia are present at the posterior end of heart of Cockroach ?

+2 votes
in Class 12 by kratos

.......... numbers of Ostia are present at the posterior end of heart of Cockroach ?

(A) One

(B) Two

(C) Three

(D) Ten

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+1 vote
by kratos
 
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Two numbers of Ostia are present at the posterior end of heart of Cockroach.

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