Comparative Physiology of Vertebrates — DU B. Sc. Life Science (Zoology) Previous Year Question Papers

(i) High-altitude adaptations in various vertebrate classes. (ii) Structure and digestion in different compartments of the rumen. (iii)Modes of reproduction in various vertebrates. (iv) Physiological responses to desert conditions. (NEP-UGCF) (P) Life Science (b) Attempt four questions in all. (c) Draw neat labelled diagrams wherever necessary. (ili) Hardware stomach (iv) Root-effect hemoglobin. (b) Differentiate between the following (i) Starvation and Fasting (iii) Gill and Parabronchial respiration (v) Estrous and Menstrual Cycle 2. (a) Compare the mechanisms of thermoregulation in homeotherms and poikilotherms. Add a note on the role of various hormones and ion channels therein. 10 (b) Describe the mechanisms of thermal regulation in desert animals. 5 3. (a) Delineate the fine structure of the fish gill and the bird lung, and compare the functional similarity between them. 8 (b) Examine the process of counter-current exchange of O, and CO, in fish and birds. 4. (a) Discuss the challenges and physiological adaptations necessary for air and aquatic respiration. 8 (b) Discuss the gradual shift in physiological fuels in response to chronic starvation in various vertebrates. 7 5. (a) Explain the general mechanisms of Osmoregulation in animals. (b) Compare and contrast the challenges of osmoregulation among freshwater and marine vertebrates. 10