C. S. E-Mains 2000: Botany

Paper-I

Section A

  1. Answer any three of the following in not more than 200 words each

    1. Describe the sexual reproduction in Equisetum.

    2. Write the different types of genetic recombination found in bacteria.

    3. With the help of suitable diagram describe the saprophyte of Funaria.

    4. Describe the life cycle of Penicillium.

  2. Give the causal organism, symptoms and control measures of the following

    1. Peach leaf curl

    2. Tikka disease of groundnut

    3. Little leaf of brinjal

  3. Describe the life cycle of Polysiphonia in detail.

  4. Write notes on

    1. Fungal toxins

    2. Methods of producing somatic hybrids and their application

Section B

  1. Answer any three of the following in not more than 200 words each

    1. Anomalous secondary growth in monocot stem

    2. Applications of palynology

    3. Polyembryony

    4. Different kinds of female gametophyte found in angiosperms

  2. Write an account of the floral structure of the following families

    1. Poaceae

    2. Ascelpiadaceae

    3. Brassicaceae

    Give botanical names of three importance plant species belonging to each of the three families and specify their uses.

  3. Describe the development of male gametophyte in Pin us. Discuss the economic importance of this genus.

  4. Answer the following questions

    1. Mention the botanical names and families of ten important drug yielding plants, source from plant parts and the uses of these drugs in human welfare.

    2. Discuss the importance of ethno botany in India.

Paper-II

Section A

  1. Answer any three of the following. Each part should be answered in not more than 200 words

    1. Biological membranes

    2. Bacterial photosynthesis

    3. Prosthetic groups of different enzymes in respiratory chain

    4. Test of significance

  2. Give a diagrammatic representation of the structure and functions of organelles in eukaryotic cells.

  3. Write notes on the following

    1. Heterosis

    2. Molecular basis of sex determination

    3. Quantitative inheritance

  4. Give a brief account of hybridization work on India crop plants.

Section B

  1. Answer any three of the following. Each part should be answered in not more than 200 words

    1. Enzyme repression and induction

    2. Buffers

    3. B-Chromosomes

    4. Global warming

  2. Give evidences in support of organic evolution. Discuss its mechanism and theories in brief.

  3. Discuss the effect of cement dust pollution on the broad leaved species of forest trees.

  4. Write detailed notes on the following

    1. Endangered plant species

    2. Endemic plants

    3. Role of mycorrhiza in tree nutrition