LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
SECOND SEMESTER – APRIL 2008
PB 2502 - PLANT DIVERSITY - II (PTERIDO,GYMNO,PALEO.)
Date : 23/04/2008
Time : 1:00 - 4:00
Dept. No.
PART-A
Answer all the questions
I. Choose the correct answer
KL 4
Max. : 100 Marks
(20 Marks)
(5x1=5)
1. The common name of Equisetum is
a) Club moss b) Walking fern
c) Horse tails d) Maiden hair fern
2. Protocorm is a stage in the development of
a) Lycopodium b) Adiantum c) Azolla
d) Psilotum
3. Canada Balsam is obtained from
a) Zamia
b) Abies
c) Taxus
d) Tsuga
4. Pavement tissue is found in the ovule of
a) Cycas
b) Pinus
c) Gnetum
d) Taxus
5. Birbal Sahni Institute of Paleobotany is located in
a) Delhi
b) Calcutta
c) Lucknow d) Kanpur
II. State whether True or False
(5x1=5)
6. Selaginella is commonly called spikemoss
7. Psedoelaters are found in Lycopodium
8. Leaves of Azolla contain bluegreen algae.
9. Eccentric secondary growth is seen in the stem of Gnetum
10. Lepidodendrons belong to the Cretaceous period.
III. Complete the following
(5x1=5)
11. False indusium is seen in .............................
12. The Transfusion tissue is found in the leaf of ........................
13. Armed palisade is seen in the leaf of ............................
14. Reimers’s classification of Gymnosperms has .................. subclasses.
15. The closely related fossil species of Equisetum is ..........................
IV. Answer the following in about 50 words
(5x1=5)
16. Define protostele.
17. Differentiate apogamy and apospory.
18. Give Four resemblances of Gnetum with Angiosperms.
19. What is radiocarbon dating?
20. Distinguish Eusporangiate Leptosporangiate fern.
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PART-B
Answer any FIVE of the following, each in about 350 words. Draw necessary Diagrams.
(5x8=40)
21. Describe the synangium of Psilotum.
22. Write notes on the prothallus of Equisetum.
23. Describe the sporophyte of Azolla.
24. Write notes on the anatomy of Pinus stem.
25. Enumerate the salient features of Cordaitales.
26. Give an account of the Indian contribution to Pteridology.
27. Differentiate petrifaction and impressions.
28. Explain various fossils of non-vascular plants.
PART-C
Answer the following questions in about 1500 words. Draw necessary Diagrams.
(2x20=40)
29. a) Describe the sporophyte of Marsilea
OR
b) Compare the gametophyte of Lycopodium and Selaginella.
30. a) Explain in detail the structure of ovules of Cycas, Pinus and Gnetum
OR
b) Describe fossils and fossilization.
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