(Pages: 1553
P.T.O.
MAR IVANIOS COLLEGE (AUTONOMOUS)
THIRUVANANTHAPURAM
Reg. No. :.………………… Name :.…………………
Third Semester Career Related B.Sc. Degree Examination, November 2016
First Degree Programme under CBCSS Core Course III: (for Botany and Biotechnology)
AUBB341: Bryology, Pteridology, Gymnosperms Paleobotany
Time: 3 Hours Max. Marks 80
SECTION A
Answer ALL the following each in a word or as short notes.
1. Elater.
2. Coralloid root.
3. Areolae.
4. Name a fossil gymnosperm.
5. Peat moss.
6. Ligule.
7. Coal balls.
8. Protonema.
9. Glossopodium.
10. Club moss.
(10 1 10 Marks)
SECTION B
Answer any EIGHT questions, not exceeding one paragraph.
11. Describe the stelar variation in Lycopodium.
12. Describe the morphology of gametophyte of Marchantia.
13. Describe the vegetative reproduction in Polytrichum.
1553
2
14. Write notes on peristome teeth.
15. Give a brief account on the classification of bryophytes.
16. What is alternation of generations Add note on diplontic life cycle.
17. Give any four xerophytic adaptations of Cycas leaflet.
18. Differentiate between apospory and apogamy.
19. Mention the similarities between Gnetum and dicots.
20. What is cleavage polyembryony Cite examples.
21. Comment on petrifaction.
22. Define heterospory. Cite an example.
2 16 Marks)
SECTION C
Short essay type Answer any SIX questions.
23. Enumerate the similarities of pteridophytes with gymnosperms.
24. With labelled diagrams, explain the structure of sporocarp of Marsilea.
25. Describe the capsule of Polytrichum with suitable diagram.
26. Describe the structure of Lepidocarpon with a diagram.
27. Give a brief account on geological time scale.
28. Discuss the morphological nature of rhizophore of Selaginella.
29. Enumerate the economic importance of pteridophytes.
30. Describe the structure of synangium of Psilotum.
31. Draw a labelled diagram of T.S. of Cycas rachis and describe the internal features.
4 24 Marks)
SECTION D
Long essay type Answer any TWO questions.
32. With labelled diagrams, describe the life cycle of Riccia.
33. Discuss the stelar evolution in pteridophytes.
34. With suitable illustrations, describe the sexual reproduction of Equisetum.
35. Describe the life cycle of Pinus with diagrams.
15 30 Marks)