Kerala Agricultural University 2005 B.Sc Botany Second Year , ch/il - Question Paper
Group IV- Botony
Paper II- Microbiology,Phycology,Mycology And Plant Pathology
(Pages ; 2) K 5126
Reg. No.
Name......
SECOND YEAR B.Sc. DEGREE EXAMINATION, MARCH/APRIL 2005
Part IIIGroup IVBotany Paper IIMICROBIOLOGY, PHYCOLOGY, MYCOLOGY AND PLANT PATHOLOGY Time : Three Hours Maximum : 50 Marks
Answers may be written either in English or in Malayalam.
Draw diagrams wherever necessary.
Part A
I. Explain any ten of the following in one or two sentences.
1 Carrageenin.
2 Plasmid.
3 Saxicoles.
4 Amphitrichous.
5 Fission.
6 Phycobilms.
7 Teleutospore
8 Coprophiloua fujigi.
9 Diatomite.
10 Parasexuality.
11 Dolipore septum.
12 Aplanospore.
13 Hypoplasia.
14 Xantho monas citri.
15 Blight of Paddy.
(10 x 1 = 10 marks)
Part B
II. Write brief notes on any ten of the following :
1 Mesosomes.
2 Isidia.
3 Oyster mushroom.
4 Heterocyst.
5 Fungi imper-fecti.
6 Bacteriophage.
7 Autotrophs.
8 Methanogenesis.
9 Actinomycetea.
10 Nitrogen fixation.
11 Tinsel flagellum.
12 Plakea.
13 Nannandria.
14 Biological control.
15 Hologamy.
Part C
(10 x 2 = 20 marks)
III. Answer any two of the following :
3 Briefly explain the role of fungi in ecosystem.
4 What are the chief methods of disease control ? Explain.
(2x4 = 8 marks)
Part D
IV. Answer any one of the following :
1 Describe the structure of sex organs in chara.
2 Briefly explain the methods of food preservation.
(1x4 = 4 marks)
Part E
V. Answer any one of the following :
1 Describe the role of microbes in industry.
2 What is an ascocarp ? Describe the various kinds of ascocarps met with in the Ascomycotina.
3 Describe the structure and life history of polysiphonia.
(1x8 = 8 marks)
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