BIOLOGY— 2003 (Set III—Delhi)
Note: Except for the following questions, all the remaining questions have been asked in Set I and Set II
SECTION - A
Q. Nos. 1-8 are of very short answer type carrying 1 mark each. Of these the first five questions are of multiple choke type which have to be answered simply as A, B,C or D The remaining questions have to be answered in approximately 1-20 words each.
Q. 3. Most digestion occurs in 1
Q. 4. White eyes in male fruit flies is determined by a 1
Q. 7. Name the infectious disease that leads to wasting of human parts. 1
SECTION - B
Q. Nos. 9-18 are of short answer type carrying 2 marks each. Answer them in approximately 20-30 words each.
Q. 10. What structure forms the ‘corpus luteum’ and at what stage? Name two hormones secreted by it. 2
Q. 11. Explain how an XXY individual can be born in humans. 2
Q. 13. How do you consider tendrils of cucumber and thorns of Bougainvillea as homologous structures? 2
SECTION - D
Q. Nos. 28-30 are long answer type carrying 5 marks each. Of these two questions Q. 29 and 30 have internal choice. Answer the questions in approximately 80-120 words each.
Q. 28. (1) What is the significance of photolysis of water in photophosphorylation? What happens to each product of this process?
Q. 30. What is cardiac cycle? Describe the events that occur during joint diastole an atrial systole. 5
Biology 2003 Question Papers Class XII
CBSE 2003 Question Papers Class XII