Cell and Developmental Biology of Animals — DU B. Sc. Life Science (Zoology) Previous Year Question Papers

Biology of Animals (NEP-UGCF) (c) Draw well-labelled diagrams wherever required. (d) All parts of a questions are to be attempted together. 1. (a) Define the following terms (any four): 4 (v) Fate map (b) Differentiate between the following (any three) : (i) Protoplasm and Protoplast (i1) Blastula and Gastrula (i11) Holoblastic and Meroblastic cleavage (iv) Area Opaca and Area Pellucida (v) Autocrine and Paracrine signaling (c) Name the germ layers from which the following are derived : 5 (v) Spinal cord 2. (a) Describe the process of spermatogenesis in mammals along with a suitable diagram. (b) Discuss the various types of morphogenetic movements. 5 3. (a) Give an elaborate account of cell cycle regulation in eukaryotes. 10 (b) Discuss the consequences of a failure in these regulatory mechanisms in the context of cancer. 5 4. What is metamorphosis? Give a detailed account of metamorphosis in amphibians along with its hormonal regulation. 15 (b) Give a detailed account of the mechanism of neural tube formation in amphibians. 7 6. Write a short notes on any three of the following : 5,5,5 (a) Von bear law (b) Extra embryonic membrane in birds (c) Types of Egg (d) Stem cell