Roll No. ............................ Total No. of Pages 3

1(CCEM)0
Botany

Paper—I


Time Three Hours] [Maximum Marks 300
Note Answers must be written in English.
The number of marks carried by each question are indicated at the end of the question.
Part/Parts of the same question must be answered together and should not be interposed between answers to other questions.

The answer to each question or part thereof should begin on a fresh page.


Your answers should be precise and coherent.


Candidates should attempt Question No. 1 and 5 which are compulsory and any three out of the remaining questions, selecting at least one question from each Section.


Provide diagrams in the answer-book wherever necessary.
(viii) If you encounter any typographical error, please read it as it appears in the text-book.
SECTION-A

1. Write short notes on any six of the following

Plectostele


Lysogeny


Kelps


Archegonia


Microbes in air


CBC-16599 1 Contd.

Distribution of ferns


Plasmids


Bryophytes as indicators of pollution. 10×6=60



2. Do bacteria have sexual reproduction Discuss.

Describe the structure of a T4 virus.


Describe the role of microbes in controlling pollution. 20×3=60



3. Describe the nature, production and importance of fungal toxins.

Describe the epidemiology, symptoms and (life) cycle of a fungal disease.


Describe the methods of control for diseases caused by nematodes. 25,25,10



4. What are cryptogams Describe the evolution of sporophyte among these plants.

Describe the economic importance of algae with special reference to agriculture and industry.


What do you understand from eusporangiate and leptosporangiate development of sporangia among Pteridophytes 25,25,10



SECTION—B

5. Attempt any four of the following

Apomixis


Double fertilization


Totipotency


Cereals


Annual rings


C4 plants. 15×4=60



6. Describe variations in arrangement of stomatal and guard cells.

Discuss various barriers to sexual incompatibility among angiosperms.


Define palynology and discuss its importance. 20×3=60


7. What do you understand from phellem, phellogen and phelloderm Discuss.

Describe the merits and demerits of Bentham and Hooker system of plant classification.


Write diagnostic features and economic importance of any two of the following families


Leguminosae


Cucurbitaceae




Cycadaceae
Rosaceae. 20×3=60
8. Describe the methods and applications of protoplast culture.

Write a note on somatic hybrids.


Define morphogenesis and differentiation. Describe major factors influencing morphogenesis. 20×3=60


CBC-16599 2 Contd. CBC-16599 3