BOTANY

Paper-1
Time Allowed Three Hours I I Maximum Marks: 2001

INSTRUCTIONS
Candidates should attempt questions 1 and 5 which are compulsory, and any THREE of the remaining questions, selecting at least ONE question from each Section. All questions carry equal marks . Marks allotted to parts of a question are indicated against each. Answers must be written in ENGLISH only. Neat sketches may be drawn, wherever • necessary. IMPORTANT NOTE All parts/sub-parts of a question must be answered contiguously .. That is, where a question is being attempted on the answer-book, all its constituent parts/sub-parts must be attempted before moving on to· the next question. Pages left blank in the answer-book(s), if any, must be clearly struck out. Answers that follow pages left blank may not"be given credit.

SECTION A
1. Answer the following keeping your answers brief and
to the point 8x5=40
Differentiate between the following
Vegetative cell, Heterocyst and Akinetes
Sporangiospores, Ascospores and Basidiospores

Write short notes im the following
Unique features. of cell wall of Eubacteria
VAM fungi as biofertilizer
Write critical notes on the following
Parasexual cycle
Quarantines
Write about the following
Cell structure of Bacillariophyta
(ii)How do toxins help in the development of vascular wilt syndrome

Differentiate between the following
Leaf trace and Leaf gap
Obligate parasite and Facultative parasite

2. Briefly discuss the following 10x4=40

Heterospory and seed habit
Telome theory
Sources of mycotoxins during storage of food and their impact on the lives of human beings and animals
Antibiotics in plant disease control

3. Write a brief account of the following 10x4=40
Mechanisms of spore dispersal in mosses
Epidemiology of wheat rust in India
Algae growing in unusual habitat
Causal organism, symptoms and control of Late Blight of Potato

4. Comment critically on tlie progressive and regressive theory of evolution in Bryophytes.
Discuss the biochemical defense mechanisms in plants, with reference to quantitative and race-specific resistance.
Describe the stelar system in vascular cryptograms.

SECTION B

5. Answer the following keeping your answers brief and to the point
Distinguish between the following
Aggregate fruit and Composite fruit
Pollination in Salvia and Ficus
Write short notes on the following
Important Botanical gardens of India and
their role in teaching. l •
Verticillaster inflorescence.
Write short notes on the following
Apomixis .
Polyembryony
Write a brief account of the following
Role of anatomy in understanding taxonomy
Ovule of Ephedra
Write short notes on the following
Epidermal appendages
Polygonum type of embryo

6. Draw scientifically accurate diagrams of the following and label the parts JOx4=40
T.S. of needle of Pinus.
Floral parts of any member of Cucurbitacea-e and Musaceae.
Floral formula and floral diagram of Leguminosae and Solanaceae.
Types of placenta.

7 Write brief and critical notes on the following IOx4=40.·

Economic importance of Gramineae, Umbelliferae and Rosaceae.
Distinguishing characters of Asteraceae, Liliaceae and Asclepiadaceae.
Classification system proposed by Bentham and Hooker as compared to that proposed by Engler and Prantl.
Plants as sources of latex, gums and dyes.

8. Write the botanical name, family and part useful for each of the following 2x10=20
Hemp
Cocoa
Nux-vomica
Betel nut
Mahogany •
Lemon grass
Sal
(viii) Isabgol
Walnut
Celery
What ls the role of somatic hybrids in crop improvement Discuss. 15 •
Bring out the role of synergids in fertilisation. 5