IFS Botany Papers 2007

IFS Botany 2007

Paper-I

Section A

  1. Answer any four of the following (Answer should not exceed 150 words in each case): (4 × 10 = 40)

    1. Differentiate between the following:

      1. Somatic embryogenesis and caulogenesis.

      2. Disease prevention and disease cure.

    2. Write short notes on the following:

      1. Concept of tot potency in plants.

      2. Vegetative reproduction in bryophytes.

    3. Answer the following:

      1. In what way does a fungal cell differ from an algal cell?

      2. What are the major differences between Gram positive and Gram negative bacteria?

    4. Write briefly about the following:

      1. Origin and evolution of sex in algae.

      2. Columella in bryophytes.

    5. Distinguish between the following:

      1. Cleistothecium and Apothecium

      2. Gymnospcrms and Pteridophytes.

  2. Answer the following questions

    1. Name several species of pathogenic oganisms that may be present in polluted water.

    2. Comment upon the importance of Heterospory (2 × 20 = 40).

  3. Protoplast-to-plant regeneration has been achieved in almost all the important plants. Describe the method of isolation, culture and regeneration of plants from protoplasts isolated from any model plant species (40).

  4. Answer the following questions

    1. Comment upon the process of progressive sterilisation of sporogenous tissue in bryophytes.

    2. Describe the process of Ascus development in Ascomycetes (2 × 20 = 40).

Section B

  1. Answer any four of the following (Answers should be within 150 words in each case) (4 × 10 = 40)

    1. Describe the following:

      1. Characteristic features of reproductive organs of Benncttitales.

      2. Botanical gardens are more than mere gardens. Substantiate the statement.

    2. Distinguish between the following:

      1. Monosporic and bisporic embryo sac

      2. Androecium of Malvaceae and Asteraceae.

    3. Write notes on the following:

      1. Progvmnosperms

      2. Double fertilisation.

    4. Describe the following:

      1. Vavilov's centres of origin

      2. Ethnobotany.

    5. Write what you know about the following:

      1. Magnoliaceae

      2. Herbarium.

  2. Drew only the labeled diagrams of the following: (4 × 10 = 40)

    1. L S of an embryo sac.

    2. T S of Dracuena stem

    3. V S Cycas ovule

    4. Floral diagram of Asclepiadaceae.

  3. Write short notes on the following (4 × 10 = 40)

    1. Intraxylary Phloem

    2. Androeciurn of Euphorbiaceae

    3. Gynoecium of Solanaceae

    4. Botanical names of any five cereal plants.

  4. Give an account of the following: (2 × 20 = 40)

    1. Development of a dicot embryo.

    2. Differences between cycadales and coniferales.

Paper-II

Section A

  1. Write short notes on any four of the following in about 150 words each:

    1. Lysosomes (10)

    2. Cytoskeleton (10)

    3. Multiple factor inheritance (10)

    4. Prion (10)

    5. Standard deviation (10)

  2. Answer the following questions

    1. With suitable diagrams, explain the structure of chromatin found in interphase nucleus (20).

    2. Explain how the chromatin is packaged in a metaphase chromosome (5).

    3. Explain the significance of the condensation/decondensation cycle of chromatin (15).

  3. Answer the following questions

    1. Enumerate the salient features of genetic code Flow is it related to evolution (20)?

    2. Give a detailed account of prokaryotic protein synthesis (20).

  4. Answer the following questions

    1. What is heterosis? Explain the genetic basis of heterosis and inbreeding depression (20).

    2. Write brief notes on different strategies for the improvement of self-pollinated crops (20).

Section B

  1. Write short note on any four of the following in about 150 words each:

    1. Anti-transpirants (10)

    2. Charismatic theory (10)

    3. Senescence (10)

    4. Social forestry (10)

    5. Intellectual Property Rights (10)

  2. Answer the following questions

    1. Trace the path of carbon in C3 plants during photosynthesis (25).

    2. Explain how Hatch and Slack pathway inC4 plants is integrated with Calvin cycle (15).

    3. Explain the mechanism of flower induction crop plants by vernalisation (15).

  3. Answer the following questions

    1. Illustrate the energy flow in an aquatic ecosystem (15).

    2. Give a comparative account on the biomechanical cycling of nitrogen and phosphorus (25).