NAVODAYA VIDYALAYA SAMITI
PUNE REGION
PRACTICE PAPER-I
SESSION -2016-17
Class: XII
Time : 3 Hours
BIOLOGY (Theory)
Max. Marks : 70
GENERAL INSTRUCTIONS:(i) The question paper consists of 26 questions divided into five sections A, B, C, D and E. All
questions are compulsory.
(ii) Section-A contains question no. 1-5 of 1 mark each.
(iii) Section B contains question no. 6-10 of 2 marks each.
(iv) Section C contains question no. 11-22 of 3 marks each.
(v) Section D contains question no. 23, value based question of 4 marks.
(vi) Section E contains question no. 24-26 of 5 marks each.
(vii) There is no overall choice. However, an internal choice has been provided in one question
of 2 marks, one question of 3 marks and all the three questions of 5 marks weightage. A student
has to attempt only one of the alternatives in such questions.
(viii) Wherever necessary, the diagrams drawn should be neat and properly labelled.
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SECTION – A
1. Which assisted reproductive technology is depicted by following diagram?
2. The Nilgiris belt form the large blue stretches in the hilly areas of Kerala, Karnataka, & Tamilnadu
and attracted a large number of tourists. What reason do you attribute to this phenomenal change
of nature once in 12 years?
3. Name the institute where female oral contraceptive pill Saheli was developed.
4. Why apple is called ‘false fruit’?
5. Name the antibody present in the mother milk.
SECTION – B
6. Identify the A, B, C and D in cut section of anther.
7. What purpose is fulfilled by
from abdominal cavity?
8. What is geitonogamy? How it
(ii) xenogamy.
decent of testis into scrotal sacs
is similar to: (i) autogamy and
9. Fill in the blanks a, b, c, d in the following table:
S.No. Description
1.
The blastomeres in the blastocyst are arranged into an outer
layer
2.
The milk produced during the initial days of lactation
3.
Asexual reproductive structure of sponges
4.
Cotyledon in grass family
Scientific term
--------a-----------------b-----------------c-----------------d----------
10. Write the expanded form of following abbreviations: (i) GIFT (ii) IMR (iii) MTP (iv) IVF
OR
Describe the lactational amenorrhea and periodic abstenience?
SECTION – C
11. Enumerate the similarities between spermatogenesis and oogenesis.
12. Where is sporopolenin present in plants? State the significance with reference to its chemical
nature.
13. How do flowers adapted to discourage inbreeding depression?
14. What are sexually transmitted diseases? How they are transmitted in human beings?
Give examples of sexually transmitted diseases.
15. Write the names of different layers of a microsporangium. State the functions of inner most layer.
16. What are chasmogamous and cleistogamous flowers? Give examples.
17. Draw a well labelled diagram of a typical angiosperm ovule..
18. All papaya and date palm plants produce flowers yet only few papaya and date palm
seen to produce fruit. What could be the possible reason for the rest not producing them?
19.What are the major features of embryonic development at various levels of pregnancy?
20. Write the role of following hormones: (i) Progesterone
(ii) Relaxin (iii) Prolactin
21. What is foetal ejection reflex? Which is the hormone produced as a result of it?
What is its role in parturition?
22. Differentiate between: (i) Perisperm and pericarp
(ii) Apomixis and polyembryony (iii) Hypocotyl and epicotyl
OR
What is surrogacy? What are the ethical issues of ‘rent a womb’ concept?
SECTION – D
23. Radha’s mother was making idli. Radha was curiously watching her. She noticed that her mother
added a small amount of yeast to the batter, mixed it and left it for some time.When they saw the
batter again, it had risen in the bowl. Radha was surprised and asked her mother about it.
(i) Why was only small amount of yeast added?
(ii) How does yeast multiply?
(iii) What is this process called?
(iv) What values are exhibited by Radha’s mother?
SECTION – E
24. (i) Explain the process of oogenesis.
(ii) Draw a labeled diagram of sectional view of human ovary showing various stages of
oogenesis.
OR
(i) Give schematic representation of various events during menstrual cycle showing uterine events
and hormonal levels.
(ii) Write the sources of secretion of progesterone.
25. (i) Explain the process of double fertilization in Angiosperms.
(ii) List the changes each part of the fertilized ovule undergoes to develop into a seed.
OR
Explain the process of development of female gametophytes in angiosperms with suitable
diagram.
26. (i) What is infertility? Mention its causes.
(ii) Describe the various techniques to assist infertile couples.
OR
What are the qualities of an ideal contraceptive? Describe the various contraceptive methods
in detail.
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