Bryophytes, Pteridophytes and Gymnosperms — DU B.Sc. (Hons.) Botany Previous Year Question Papers

(e) L.S female cone of C);cczs 4. Write short notes on the following (any three) (a) Economic Importance of Gymnosperms (b) Significance of P/G);sco#cz./re//cz as a model system (c) Hydrophytic and Xerophytic characters of (d) Heterospory and seed habi.t (e) Significance of transfusion tissue 5. (a) Describe the morphology and reproductive structures of pz.Jc#s. (8) (b) Ecological and economic importance of fpfeczg7cc{774. 6. .(a) With the. suitable diagram discuss the stellar evolution in pteridophytes. (8) (b) With suitable diagrams describe the structure and reproduction in Fif77czrz.cz. (7) 3. 4. Attempt four questions in all. Answer al`1 parts of each question together. 5. Draw diagrams wherever required. 1. (a) Define the following (any five): (1x5=5) (i) Gemma cup (ii) False inducium (iil) Elaters (iv) Circinate vernation (vi) Sulphur shower (b) Fill in the blanks (any five): (1x5=5) (i) _called as water conducting cells in bryophytes. (ii) A cluster of sporangia on the underside of a fern frond is called a (iii) The water conducting tissue in gymnosperms is (iv) The sporophyte of Anthoceros possesses a sterile central column called the (v) The capsule of Funaria opens by means of teeth-like, structures called (vi) The fossil of Rhynia was discovered by (c) Match the following : (1x5=5) (i) Winged pollen grains (a) Cycas (ii) Sago palm (b) Pinus (iii) Model system (c) Anthoceros (iv) Horn like sporophyte (d) Rhynia (v) Fossil pteridophyte (e) Ephedra 2. Differentiate between the following (any three (c) Apospory and Apogamy (d) Sporophyte of Anthoceros and Marchantia (e) Male and Female strobilus of Gnetum 3. Draw well labelled diagrams of the following (any three) (3×5=15) (a) V.S Marchantia thallus passing through gemma cup (b) L.S. strobilus of Selaginella (c) T.S internode of Equisetum