Paper : CBSE Class 12th Biology Exam Paper, 2004 (Outside Delhi: Set - 2 And 3)

(Outside Delhi: Set - 2)

SECTION - B

Q. 1. Name the cavity in the girdle, into which the head of the femur fits. 1

Q. 2. Newt regenerates its amputed limb. What type of regeneration is it? 1

SECTION - B

Q. 8. Differentiate between callus culture and suspension culture. 2

Q. 9. Where are cytokinins synthesised in plants? Mention any two of their functions. 2

Q. 10. What is the role of carbonic anhydrase in humans? Where is it operative? 2

Q. 14. Describe the condition termed as atherosclerosis. How does it affect the body? 2

SECTION - C

Q. 17. What is meant by ecological succession? Differentiate between pioneer community and climax community. 3

Q. 18. Differentiate between osmoregulators and osmoconformers. Under which category will you place Hagfish? Why is it exceptional? 3

(Outside Delhi: Set - 3)

SECTION - A

Q. 1. Both the thin and the thick segments of the ascending limb of Henle's loop transport NaCI out to the interstitial fluid. What is the difference in their respective mode of transport? 1

Q. 2. Newt regenerates its amputed limb. What type of regeneration is it? 1

Q. 5. What is meant by replacement level with reference to human population growth? 1

SECTION - B

Q. 7. How is a cactus adapted to survive in its habitat? 2

SECTION - D

Q. 27. Where is electron transport system operative in mitochondria? Explain the

system highlighting the role of oxygen. 5

Or

Where does Calvin cycle take place in chloroplast? Explain the cycle.