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Practical: Study of Nostoc

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 Practical: Study of Nostoc Nostoc is a filamentous, photosynthetic cyanobacterium. It commonly occurs in freshwater, moist soil, wet rocks and other damp habitats. Colonies are usually gelatinous because numerous filaments remain embedded in a mucilaginous matrix. Materials Required Fresh or preserved Nostoc material, clean glass slide, cover slip, dropper, dissecting needle, water, blotting paper and compound microscope. Procedure Take a small quantity of Nostoc colony with the help of a dissecting needle and place it on a clean glass slide. Add one or two drops of water and gently tease the material so that the filaments become separated. Place a cover slip carefully over the material without trapping air bubbles. Remove excess water with blotting paper. First observe the preparation under low power and then under high power of the compound microscope. Observations The plant body of Nostoc is thalloid and usually forms a soft, jelly-like colony. A colony contains numerous ...
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Ascobolus Character

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Sample F1 Characteristics:   1.  The thallus is made of richly branched mycelium that forms a complex structure and finally a cup shaped structure. 2. The hyphal masses penetrate the substratum. These act as organs of absorption for the aerial branches. 3. The hyphae are branched and septate. Each cell is multinucleate. 4. The male reproductive organs are antheridia and the female reproductive organs are called ascogonia. 5. Antheridia and ascogonia are borne at the tips of separate branches. 6. Antheridium is borne at the tip of antheridial branch. It is cylindrical or clavate in shape. 7. Each antheridium is multinucleate. 8. Ascogonium is also present at the tip of the ascogonial branch. It is sub-globose in shape and is multinucleate. 9. The ascocarps are apothecia and develop as a result of fertilization. 10. These are yellowish and saucer shaped. 11. Apothecium is a cup-shaped structure that is made of...
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Taxonomy Short Question

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  Q. 1. What is biosystematic phase ? Biosystematic phase is the part of classification showing phylogeny and relationship among the group of plants by cytological or embroylogical evidence  of plants . Q. 2. What is basionym ? The combination which is based on an earliest legitimate name , the earliest legitimate name is called basionym . Q. 3 .  Name the type genus of Umbelliferae .  The type genus of Umbelliferae ( Apiaceae ) is Apium sp . Q. 4. What is Adansonian taxonomy ? Michel Adanson, a French botanist , included the rejection of all the artificial classification for natural and the description of taxa more or less equivalent to modern orders and families . The taxonomy which is based on Adanson principle is called Adansonian taxonomy . Q. 5. Write the name of the plant having labellum in the flower    Vanda tessellata is a plant which has labellum in the flower . Q. 6. Name a plant having unistaminate flower .  Vanda roxburgii (orchedaceae)...
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