Class – XII (Year 2009)

Subject – Biology - (Foreign)

General Instructions:

1. All Questions are compulsory.

2. Wherever necessary, the diagrams drawn should be neat and properly labelled.

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

(E-Book) CBSE Board Class 12th Papers PDF : Biology

Courtesy: cbse.nic.in