NEW! Sample Papers Books : Class-X, Class-XII
All Questions are compulsory.
Wherever necessary, the diagrams drawn should be neat and
Q.1 BOD of two samples of water A and B were 120 mg/L and
400 mg/L respectively. Which sample is more polluted ?
Q.2 Name the type of interaction seen between whale and
the barnacles growing on its back.
Q.3 Which one of the following is used in apiculture:
Hilsa, Apis indica, Sonalika
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