LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
FIRST SEMESTER – APRIL 2012
PB 1505/PB 1502/PB 1500 - PLANT DIVERSITY - I (ALGOLOGY, MYCOLOGY,
BRYOLOGY)
Date : 28-04-2012
Time : 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART- A
ANSWER THE FOLLOWING, EACH WITHIN 50 WORDS ONLY:
(10x2=20 marks)
1. Mention any four algae of unusual habitats.
2. Differentiate between aplanospores and hypnospores.
3. Explain briefly any two uses of agar-agar.
4. Give two main distinguishing features of heterocyst.
5. Explain rhizomorph.
6. Write about any two asexual spores of fungi.
7. Causal organism and symptom of white rust of crucifers.
8. Causal organism and symptoms of red rot of sugar cane.
9. Describe the external features of antheridiophore.
10. Describe the internal structure of the leaf of Funaria.
PART-B
ANSWER THE FOLLOWING, EACH ANSWER WITHIN 500 WORDS;
DRAW DIAGRAMS WHEREVER NECESSARY:
(5X7=35 Marks)
11. a) Describe the structure of a prokaryotic cell.
(OR)
b) Give an account of the range of thallus structure in algae.
12. a) Describe the sexual reproduction in Vaucheria.
(OR)
b) Give an account of the asexual reproduction in Ectocarpus.
13. a) Write on the habit and nutrition of fungi.
(OR)
b) Give an account of the sexual reproduction in fungi.
14. a) Describe the mature basidiocarp of Polyporus.
(OR)
b) Give an account of the vegetative structure & reproduction of Colletotrichum.
15. a) Describe the internal structure of the thallus of Marchantia.
(OR)
b) Describe the sporophyte of Anthoceros.
PART-C
ANSWER ANY THREE OF THE FOLLOWING, EACH WITH 1200 WORDS;
DRAW DIAGRAMS WHEREVER NECESSARY:
(3X15=45 Marks)
16. Describe the life cycle patterns in algae.
17. Give an account of the economic importance of algae.
18. Give the salient features of the fungal classes according to Alexopoulus.
19. Give an account of the types and reproduction of lichens.
20. Describe the external morphology and L.S. of capsule of Funaria.
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