Annamalai University 2010-1st Year B.Sc Botany - - - - I - Algae, fungi, virus, lichens and plant diseases - Question Paper

B.Sc. DEGREE EXAMINATION, 2010
(BOTANY)
(FIRST YEAR)
(GROUP-A-MAIN)
(PART-III/PAPER-I)
530. ALGAE, FUNGI, VIRUS, LICHENS AND PLANT DISEASES
May) (Time: three Hours
Maximum: 100 Marks
SECTION-A
ans ALL ques. (10×3=30)
All ques. carry equal marks

1.Akinetes.
2.Cyanophycean granules.
3.Coenobium.
4.Conceptacle.
5.Saprophytes.
6.Sac fungi.
7.Conidia.
8.TMV.
9.Gram Staining.
10.Fungicide.
SECTION-B
ans ALL ques. (8×5=40)
All ques. carry equal marks

11.a) explain the primitive features of Cyanophyta.
(OR)
b) Differentiate ranging from heterocyst and vegetative cell in cyanophyta.
12.a) define the thallus structure of Oscillatoria.
(OR)
b)Discuss salient features of Chlorophyta.
13.a) explain the evolutionary patterns in Volvocales.
(OR)
b)Describe the structure of antheridium in Chara
14.a) List 3 differences ranging from fungi and algae.
(OR)
b)"Fungi are closely related to animals than plants"-Discuss.
15.a) define the ultra structure of a fungal cell.
(OR)
b)Discuss the mode of nutrition in fungi.
16.a) Classify bacteria based on Flagelle.
(OR)
b)Describe how endospore is formed in bacteria?
17.a) define the structure of T4 bacteriophage.
(OR)
b)Describe lysogenic cycle in Virus.
18.a) define the causative organism, symptoms and control measures of any fungal disease that you have learned.
(OR)
b)Describe the causative organism, symptoms and control measures of any fungal disease that you have learned.

SECTION-B
ans any 2 ques. (2×15=30)
every ans should not exceed 1200 words

19.Give an account of thallus organization in Chlorophyta.
20.Describe the habit, structure and methods of reproduction of Oedogonism and indicate the features of special interest in the life cycle of Oedogonimum.
21.Describe the kinds of spores produced in Puccina.
22.Describe how lichens reproduce and mention their economic importance.
23.Name any 4 plant diseases, their causative organism and symptoms.

Earning:   Approval pending.