IFS Botany 2001
Paper-I
Section-A
1. Answer any four of the following (Your answers should not exceed 150 words for each of the sub-sections): (10 × 4 40)
a. Write short notes on:
I. Thermophylliceubacteria
II. Symbiotic nitrogen-fixing bacteria
III. Microbes which produce economically useful products
IV. Oncogenic viruses
b. Answer the following:
I. Write a short account of host specific toxins.
II. What is ‘Koji’ fermentation? How is it formed and what are the products produced by it?
III. Bio-deterioration caused by microbial organisms in agricultural produce. Explain this phenomenon.
IV. What are fungicides and how are they applied in standing crops and plant products?
c. Explain the following:
I. Canker
II. Blight
III. Galls
IV. Mosaic
d. Describe the following:
I. Heterocysts
II. Akinetes
III. Water bloom algae
IV. Witches'broom
e. Write short notes on:
I. Diatoms
II. Viroids
III. Mycoplasma
IV. Proteases
2. Answer the following questions
a. Give an account of various kinds of biofertilisers.
b. How do food infection and food poisoning Occur? Explain (20 × 2 40).
3. Answer the following questions
a. The rusts of cereals are polymorphic in nature. Explain this statement and draw the lifecycle and control measures.
b. Give an account of the improvements made in activities of micro-organisms in forestry, agriculture, industry and environment (20 × 2 40).
4. Describe the following: (10 × 4 40)
a. Economic importance of blue-green algae
b. Sporophyte of Selaginella
c. Archegoniophore of Marchantia
d. Sporophyte of Marsilea

Section B
1. Answer any four of the following (Your answers should not exceed l50words for each of the sub-sections): (10 × 4 40)
a. Distinguish the following:
I. Storied and non-storied wood
II. Free central placentation and parietal placentation
III. Interxylary and intraxylary phloem
IV. Latex-tubes and resin canals
b. Describe the following:
I. Equisetum species are not primitive vascular cryptogams
II. Stamens in Cucurbitaceae
III. Translators in Asclepiadaceae
IV. Anomalous secondary growth
c. Describe the following:
I. Reproductive structure in Lycopodium
II. External morphology of Ephedra
III. Protein Synthesis
IV. Cycadofihicales
d. Write short notes on the following:
I. Ecosystem
II. Floral diagram in Solanaceae
III. Distribution of Williamsonia
IV. Carpels in dicots
e. Briefly describe the following:
I. Kranz Syndrome
II. Herbarium Techniques
III. Type Specimen
IV. Hydrosere
2. Answer the following: (10 × 4 40)
a. Discuss photoperiodism and flowering.
b. What is experimental embryology? Explain.
c. What is Ginkgo biloba called a living fossil?
d. Write about the reproduction in Taxus.
3. Answer the following: (10 × 4 40)
a. Write an account of the family Rubiaceae and compare it with that of Verbenaceae.
b. Describe the family Cucurbitaceae, giving floral diagrams, floral formulae.
c. Where are the National Botanical Gardens and Lloyd Botanical Gardens? How are herbaria in botanical gardens arranged?
d. Write about the economic importance of the family Asteraceae.
4. Answer the following questions
a. Mention he botanical name, family and plant part used of the following: (10 × 2 20)
I. Teak
II. Heeng
III. Jute
IV. Turmeric
V. Sarpagandha
VI. Cocoa
VII. Cotton
VIII. Bamboo
IX. Opiuni
X. Peppermint
b. Write an account of Takhtajan system of classification of plants