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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

SECOND SEMESTER – April 2009

    PB 2504/PB 2502 – PLANT DIVERSITY – II (PTERI.,GYMNO.,& PALEOBOT.)

 

 

 

Date & Time: 23/04/2009 / 1:00 – 4:00            Dept. No.                                                          Max. : 100 Marks

 

 

PART – A ( 20 MARKS)

1. Choose the correct answer:                    (5 x 1 = 5)           
2. TRANSFUSION tissue is found in.
3. Azolla             Marsilea      c. Pinus           d. Cycas
4. Circinate vernation is seen in
5. Rhynia             Gnetum       c.Pinus                        d. Cycas
6. Polyembryony is seen in
7. Pinus             Adiantum     c. Azolla          d. Marsilea
8. Lycopodium is referred to as
9. Horsetail Peatmoss     c. Rockmoss    d. Clubmoss
10. Calamites is from the order.
11. Equisetales Selaginellales           c. Lepidodendrales     d. Psilophytales

 

1. STATE WHETHER THE FOLLOWING STATEMENTS ARE TRUE OR FALSE:

(5 x 1 = 5)

6. Pteridophytes are known as Vascular Cryptogams.
7. The most highly evolved among Gymnosperme is Gnetum.
8. Vegetative reproduction in Psilotum is not by Gemmae.
9. In Gymnosperms in the Pycnoxylicwood, the pith & cortex get much reduced, and in Mano Xylic wood, pith is larger and Cortex is extensive.
10. The members of Cordaitales were group of Tree like plants.

 

• COMPLETE THE FOLLOWING: (5 x 1 = 5)

11. In pteridophyte, a spone, on germination grows into a ___________________, which is a gametophyte.
12. Rhynia belongs to the order______________.
13. The Maiden Hair Fem is ______________.
14. In Lycopodium the genus is divided into Urostachya and _______________.
15. In _______________ plant, the foliage leaves are aciculars.

 

1. ANSWER ALL THE QUESTIONS, EACH WITHIN 50 WORDS ONLY: (5 x 1 = 5)
2. Mention any 2 Indian Species of Cycas.
3. Mention 2 angiospermic characters of the Ovule of Gnetum.
4. What is a Megasporophyll?
5. Mention any one Fem characters of Marsilea.
6. Where do you find the Vallecular Canals and Carinal Canals?

 

 

PART – B

 

ANSWER THE FOLLOWING, EACH ANSWER WITHIN 500 WORDS, DRAW DIAGRAMS WHEREVER NECESSARY:                                                                  (5 x 7 = 35)

21. a) Write notes on Lepido dendron

(OR)

1. b) Describe the Sporocarp of Marsilea.

 

22. a) Describe the anatomy of Pinus Needle.

(OR)

1. b) Write about the Coralloid root of Cycas.

 

23. a) What are the different types of Fossils?

(OR)

1. b) Write down the General characters of Benne ttitales.

 

24. a) Describe the Gametophyte of Equisetum.

(OR)

1. b) Write about the origin of Pte ridophytes.

 

25. a) Discuss the salient features of coniferales.

(OR)

1. b) Explain the salient aspects of Psilophyta

 

 

PART – C                                         

 

ANSWER ANY 3 QUESTIONS. EACH WITHIN 1200 WORDS, DRAW DIAGRAMS WHEREVER NECESSARY.                                                                                         (3 x 15 = 45)

 

26. Write an Essay on the stelar system in Pteridophytes.

 

27. Describe the female cone and the structure of ovule in Pinus.

 

28. Describe the Fossil plants: 1) William Sonia

2) Calamites

3) Rhynia

29. Compare the Strobilus of Lycopodium and Equisetum.

 

30. Write Notes on the following:
31. a) General characters of gymnosperm
32. b) Salient Features of Cordaitales
33. c) How to determine the age of fossils?

 

 

 

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