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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034 B.Sc.DEGREE EXAMINATION PLANT BIOLOGY AND PLANT BIOTECHNOLOGY SECONDSEMESTER APRIL 2017
PB 2504- PLANT DIVERSITY IIPTERIDO.,GYMNO., PALEOBOTANY
Date: 04-05-2017 Dept. No. Max. 100 Marks
01:00-04:00
PART A (10 x 2 20 marks) Answer the following, each within 50 words.
01. What is heterospory?
02. Distinguish between Eusporangium and Leptosporangium.
03. What is a Synangium?
04. Write notes on Marsileasporocarp.
05. Write any two characters of Cycadales.
06. Mention the concept of Progymnosperms.
07. What are coralloid roots?
08. Write notes on Pinus female cone.
09. Who is the 'Father of Indian Paleobotany"?
10. Write a brief note on Compression.
PART B x 7 35 marks) Answer the following, each within 500 words. Draw diagrams and flow charts wherever necessary.
11a. Outline the classification of Pteridophytes by Reimer.
b. Describe the general characters of Pteridophytes.
12a. Explain the structure of Equisetum cone.
b. Write a detailed account on the economic importance of Pteridophytes.
13a. Describe the salient features of Bennettitales
b. Discuss the affinities and differences of Gymnosperms with other vascular plants.
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14a. Describe the internal structure Cycas Ovule.
b. Give an illustrated account of Pinusneedle.
15a. Explain the structure Williamsonia.
b. Write an account on Geological time scale.
PART C x 15 45 marks) Answer any three of the following, each within 1200 words. Draw diagrams and flow charts wherever necessary.
16. Write an account on the stelar system in Pteridophytes.
17. Explain the structure and reproduction of Lycopodium.
18. Discuss the general characters of Gymnosperms.
19. Describe the reproduction in Gnetum.
20. Write an account on the external and internal structure of Lepidodendron.