LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
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B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
FIRST SEMESTER – November 2008
PB 1502 / 1500 – PLANT DIVERSITY – I
(ALGOLOGY, MYCOLOGY, BRYOLOGY)
Date : 10-11-08 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
PART – A
Answer ALL questions, each within 50 words only (10 X 2 = 20 marks)
- Distinguish between epipelic and epilithic algae.
- Mention any two features of prokaryotic cells.
- What is coenobium? In which genes it is found?
- List any four distinguishin features of Cyclotella.
- What are obligate parasites?
- Write about any two features of Apothecium of Peziza.
- What is dikaryotization?
- Name any two types of lichens.
- What are gemmae?
- What is the common name for Anthoceros? Why it is called so?
PART – B
Answer the following, each within 300 words.
Draw a diagrams wherever necessary. (5 X 7 = 35 marks)
- a) Give an account of pigments in different classes of algae.
(or)
- b) Discuss the lifecycle patterns in Algae.
- a) Describe the cell structure of Anabaena
(or)
- b) Give an account of asexual reproduction in Ectocarpus.
- a) Explain parasexuality in Fungi.
(or)
- b) Write an account of nutrition in Fungi.
- a) Discuss sexual reproduction in Saccharomyces
(or)
- b) Describe the internal structure of thallus of Fruticose lichen.
- a) Explain the structure of archegonium in bryophytes.
(or)
- b) Describe the capsule in Funaria.
PART – C
Answer any three questions, each within 1200 words. (3 X 15 = 45 marks)
- Give an account of classification of algae proposed by Harold C Bold.
- Describe the lifecycle of Polysiphonia.
- Discuss the various fruiting bodies produced by fungi.
- Why puccinia is called heterocecious fungus? Explain its lifecycle.
- Compare the sporophyte of marchantia and Anthoceros.
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