C. S. E-Mains 2007: Botany

Paper-I

Section A

  1. Answer any three of the following in not more than 200 words each: (20 × 3 = 60)

    1. Describe the types of plant diseases caused by viruses. Explain their control measures.

    2. Describe ultrastructure of flagella in Algae.

    3. Describe and draw labelled diagrams of steles in pteridophytes with examples.

    4. Enumerate economic uses of fungi in India.

  2. Write critical notes on the following: (20 × 3 = 60)

    1. Algae as a food, feed and medicine

    2. Distribution of bryophytes and pteridophytes in deciduous and evergreen forests in India

    3. Applications of plant tissue culture in forestry and agriculture

  3. Write notes on the following: (20 × 3 = 60)

    1. Reproductive stages in Oedogonium

    2. Asexual reproduction in Aspergillns

    3. Ultrastructure of a bacterial cell

  4. How do the following differ from each other: (20 × 3 = 60)

    1. Fungal hyphae and Algal filament

    2. Sporophytes of Anthoceros and Funaria

    3. Prothalli of Selaginella and Nephroiepis

Section B

  1. Answer an three of the following in not more than 200 words each: (20 × 3 = 60)

    1. Discuss secondary growth in lianas.

    2. Give an account of the use of pollen morphological characters in systematics.

    3. Describe the importance of ethnobotany in the welfare of tribal and rural people.

    4. Compare the outline of system of classification of angiosperms proposed by Hutchinson with the system proposed by Bentham and Hooker.

  2. Write notes on the following: (20 × 3 = 60)

    1. Botanical name, active constituents and uses of any five commercial medicinal plants of India

    2. Secondary growth in woody monocors

    3. Origin of cultivated plants with reference to Vavilov's theory

  3. Draw neat and labelled diagrams of the following: (20 × 3 = 60)

    1. Stomata of sunflower and maize

    2. Male cone and Microsporophyll of Pinus

    3. Male and female flower of Euphorbia

  4. Answer the following: (30 × 2 = 60)

    1. Give an account of diagnostic characters of Liliaceae and Palmae with suitable examples.

    2. Describe the commercial importance of gum, resin and dye yielding plants in India.

Paper-II

Section A

  1. Write short notes on any THREE of the following in not more than 200 words, for each: (20 × 3 = 60)

    1. Structure of mitochondria in relation to function

    2. Prions

    3. Male sterility

    4. Probability and distributions, with suitable illustrations.

  2. Answer the following questions

    1. Describe the molecular basis of cell cycle (30).

    2. Describe the principles of protein biosynthesis.

  3. Answer the following questions

    1. Discuss the methods of gene mapping (30).

    2. Explain the methods of transfer of genes into plants (30).

  4. Answer the following questions

    1. Describe the methods of selection and hybridization used in plant breeding (30).

    2. Explain the structure and significance of lampbrush and B-chromosomes (30).

Section B

  1. Write short notes on any THREE of the following, in not more than 200 words each: (20 × 3 = 60)

    1. Co-enzymes

    2. Nitrogen cycle

    3. Vernalization

    4. Red Data Book and its relevance to plant diversity.

  2. Answer the following questions

    1. Describe the components of photosynthetic electron transport, with reference to the structure of thylakoid membranes (30).

    2. Discuss the adaptive measures of plants in response to their exposure to water stress (30),

  3. Answer the following questions

    1. What is dormancy? Where does it occur in plants? Describe various methods of breaking dormancy (30).

    2. Enumerate the applications of growth hormones in agri-horticulture, while commenting on their physiological basis (30).

  4. Answer the following questions

    1. Give an account of various ecological factors that influence plant community (30).

    2. Describe and distinguish afforestation, deforestation and social forestry (30).