Nonchordata – Protists to Pseudocoelomates — DU B.Sc. (Hons.) Zoology Previous Year Question Papers

3. Draw well-labelled diagrams wherever necessary. 1. (1) Define the following terms (any four) : (4) (b) Bilateral Symmetry (c) Holozoie nutrition (e) Metachronal rhythm (il) Differentiate between the following pairs any two) : (4) (a) Endomixis and Autogamy (b) Primary host and Secondary host (c) Dactylozooids and Gonozooids (iii) Match the Columns : (4) (a) Apopyle 1) Hydra (b) Amphids 2) Paramecium (c) Kappa particles 3) Sponges (d) Coelenteron 4) Nematoda (iv) Give the exact location and one function of each of the following (any three): (3) (b) Penial spicules 2. (a) Explain the process of conjugation in Paramecium. Discuss its significance. (10) (b) Discuss the sol-gel theory of locomotion in Amoeba with the help of diagram. (5) 3. (a) Give the general characteristics of Phylum (b) Define polymorphism. Give a detailed account of polymorphism in Siphonophora and its significance. 4. (a) Define corals. Explain in detail different types of coral reefs. (9) (b) Give an outline classification of phylum Platyhelminthes with characters and examples of each class. (6) (a) Explain the course of migration of Ascaris larva within its host body. (10) (b) What is Parazoa? Mention its main features. (5) Write short notes on any three of the following: (a) Parasitic adaptations in Helminthes (b) Ciliary locomotion in Paramecium (c) Syconoid Canal System (d) Affinities of Ctenophora