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  • W.B.C.S Main 2000 Optional Question Paper Botany.
    Posted on January 10th, 2019 in Botany
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    W.B.C.S Main 2000 Optional Question Paper Botany.

    W.B.C.S Main 2000 Optional Question Paper Botany – PAPER – 1

    GROUP- A : Answer any four of the following questions

    1. Write brief notes on any four of the following :-      10 x 4

    (a) Endemism.

    (b) Virioids.

    (c) Lichens.

    (d) Mycorthiza.

    (e) Plasmids.

    (f) Phyto remedietion.

    2. Distinguish between any four of the following :      10 x 4

    (a) Endemic and epidemic diseases,

    (b) Flagella and piili.

    (c) Plesiomorphy and apomorphy.

    (d) Apospory and apogamy.

    (e) Habitet and niche,

    (f) Disease triangle and disease cycle.

    3. Explain any four of the following :       10 x 4

    (a) Korpei-Kappe theory of root apex,

    (b) Development of endosperm in angiospeims.

    (c) Conservation of bicdiversrity.

    (d) Distinguishing features of Archaea and Bacteria,

    (e) Ovule types of angiosperms.

    (f) Colonisation and rise of early land Plants.

    4. Comment on any four of the following :      10 x 4

    (a) Metallophytes.

    (b) Endospore.

    (c) Alpha-and omega taxonomy,

    (d) Hyphal forma in fungi,

    (e) Evolution of stelar types,

    (f) Biofertillizer.

    5. Discuss any four of the following :    10 x 4

    (a) Disease cycle in late Blight of Potato,

    (b) Evolution of sporophytes in Bryophytes.

    (c) Structural features of Lyginopteris.

    (d) Micro sporogenesis and microgametogenesis.

    (e) Ecological succesion.

    (f) ontogeny of trachea.

     

    Group-B : Answer any two questions

    6. (a) Describe the role of Bryophytes in plant succession.          10

    (b) Write in brief about the origin of alternation of generations in Bryophytes.       10

    7. (a) Describe geological time scale with dominant Plant groups through ages.      10

    (b) Describe evolutionary significance of fossil pteridophytes.      10

    8. (a) Describe the ultrastructure and chemical composition of plant cell wall.      10

    (b) When does anomalous secondary grouth occur in some dicot stem ? Describe the structural anomalies in secondary qrowth observed in Boerhaavia stem.      10

    W.B.C.S Main 2000 Optional Question Paper Botany – PAPER – 2

    Group – A

    Answer any three questions

     

    1.   What is heterethallism ?  Describe the phenomenon with reference to Mucor.  Give an account of a fungus of medicinal importance.  Name the active principle and mention its source.       2+6+8+4

     

    2.   What do you mean by Fungi Imperfacti ?   Mention the causal organism of  ‘brown spot of rice”.  What are the symptoms observed ?   How do you control the disease ?  What are aflatoxius and phytoalexin ?      2+2+4+4+8

     

    3.  (a)  Give a general account of the distribution of photosynthetic tissues in the members of bryophytes you have studied.         8

    (b)  Name one imprtant character by which thallophyta differs from bryophyta.       2

    (c)  State the structural differences between the spore bearing organs of Lycopodium and Equisetum.        6

    (d)  Mention the fern characters of Cycus.        4

     

    4.  (a)  What do you understand by artificial and phylogenetic systems of classification of plants ?  Discuss the principles on which these classifications are based.          4+6

    (b)  Compare the diagnostic characters of Schitamineae with those of Orchidaceae and indicate their systematic positions.       6

    (c)  Name the families to which the following plants belong and write down the type of inflorescence of each – (i)  banana ;    (ii) Wheat;    (iii) Onion ;   (iv) Coriander.        4

     

    5.   (a) Mention the growth forms of lichens with examples. Explain the symbiotic relationship of lichen.       6+2

    (b) What is ovule ?  State the different types of ovules found in angiosperms with examples.      2+6

    (c)  Mention the type and the edible parts of the following fruits:  (i) apple;    (ii) tomato;   (iii) orange    (iv)  pomegranate.        1×4

     

    Group – B

    Answer any two questions

     

    6.   Write brief notes on any five of the following :

    (a)   Kock’s postulate

    (b)   Genetic spiral :

    (c)   Hyperplastic symptoms ;

    (d)   Tetrasporic female gametoplyte ;

    (e)   Pyenoxylic wood ;

    (f)   Aggregate fruit ;

    (g)  Syngenesions and synandrous stamen.         4×5

     

    7.   Distinguish between the following pairs (any four) :

    (a)    Stipule and Stipel.

    (b)    Gram negative and gram positive bacteria.

    (c)    Virus and plasmid.

    (d)    Retrovirus and reovirus.

    (e)    Salk vaccine and Sabin oral vaccine.

    (f)    Virus and Viroid.         5×4

     

    8.   (a)  Name two components of a bacterial cell wall which are not present in the cell wall of higher plants.     4

    (b)  What is pasteurization ?  How can we count virus particles ?        2+2

    (c)   Describe the structural charaegteristies of monocotyledon seed. How does it differ from dicotyledon seed ?       4+2

    (d) Discuss various theroies regarding the origin of angiosperms.

     

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