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P.T.O.
MAR IVANIOS COLLEGE (AUTONOMOUS)
THIRUVANANTHAPURAM
Reg. No. :.………………… Name :.…………………
First Semester Career Related B.Sc. Degree Examination, November 2018
First Degree Programme under CBCSS Core Course (for Botany and Biotechnology)
AUBB141: Phycology, Mycology, Lichenology and Plant Pathology
Time: 3 Hours Max. Marks 80
SECTION A
Answer ALL the following each in a word or as short notes.
1. Name the algal group which is the source of Agar.
2. Heterocysts.
3. Necrosis.
4. Name the scientist who discovered heterothallism for the first time.
5. Frustules made of ……………….are characteristic of diatoms.
6. Name the causative organism of Citrus canker.
7. Carrageenan.
8. Paraphysis.
9. Name the fungus known as the sugar fungus.
10. Which fungus is called as white rust
(10 x 1 10 Marks)
SECTION B
Answer any EIGHT questions, not exceeding one paragraph.
11. What are the two methods of vegetative reproduction in Lichens
12. What are the symptoms of Root wilt of Coconut
13. What is the economic importance of Lichens
14. What is Isogamy Explain it with a labeled diagram.
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15. Briefly explain algal bloom.
16. What are the general characters of Myxomycotina
17. What are the salient features of Vaucheria
18. Write the method for preparation of Tobacco decoction.
19. Draw a well labeled basidiocarp of Agaricus.
20. Draw and label the coenobium of Volvox.
21. What are red tides
22. Explain the process of budding in yeasts.
x 2 16 Marks)
SECTION C
Short essay type: Answer any SIX questions.
23. Write the classification of lichens based on their thallus structure.
24. Differentiate perithecium from apothecium with the help of labeled diagrams.
25. Describe the method of cell division in Oedogonium.
26. What is heterothallism Give an example.
27. Discuss the role of blue green algae as biofertilizer.
28. Describe the reproduction and life cycle of Rhizopus.
29. What are the parasitic adaptations of Albugo
30. Describe the stroma of Xylaria.
31. Write the causative organism, symptoms and control measures of Tapioca Mosaic Virus.
x 4 24 Marks)
SECTION D
Long essay type: Answer any TWO questions.
32. Write an account on the economic importance of fungi.
33. Explain the life cycle of Puccinia.
34. Compare the four classes of Ascomycotina.
35. Describe in detail the range of thallus structure and evolutionary trends in green algae.
x 15 30 Marks)