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Questions for 21July Zoology
Q:-1Discuss the general features and life history of Pila with suitable diagrams. (20) Q:-2 Explain the process of torsion and detorsion in Gastropods. Discuss its significance and implications on physiology. (15) Q:-3 Compare the life history of Sepia and Lamellidens. (20) Q:-4 With diagrams explain the process of whole animal cloning. Describe various methods of making hybrid organisms. (15) Q:-5 What is transgenic organism? Discuss its significance in modern day society. (15)
CANAL SYSTEM IN Porifera
Canal system in Porifera (sponges) Body of all sponges is the perforated by large number of apertures through which water enters Inside body and flows through a system of criss-crossing canals collectively forming the canal system which is a characteristic feature of poriferans. Following types of canal systems are found in sponges: Ascon type, with flagellated spongocoel Sycon type, with flagellated radial canals Leucon type, with flagellated chambers Rhagon type, with conical shape and broad base ASCON TYPE This is the simplest type of canal system and is found in Leucosolenia and other homocoela. Ostia are present on the surface of body and lead directly into the spongocoel, which is lined by flagellated choanocyte cells. Spongocoel opens to the outside through a narrow circular opening, the osculum located at the distal free end of the sponge body. Water enters through ostia into spongocoel and goes out of body through the osculum . SYCO...
Questions for 24 July zoology
Q:-1 Explain the metamorphosis in Urochordata. Discuss its peculiar systematic position and affinity with invertebrates. (20) Q:-2 Give the affinity and characteristic features of Balanoglossus. (15) Q:-3 What is neurotransmitter? Explain is signalling mechanism. Describe various types of signalling molecules. (20) Q:-4 What is apoptosis? Describe the role of Bcl-2 family in apoptosis. How mitochondria is regulating process of apoptosis? (15+5) Q:-5 Discuss the implications of impaired signalling pathways. How biotechnology can play a role in it? Describe any one common congenital disorder due to impaired functioning of Signalling pathway. (20)
Questions for 25 July zoology
Q:-1 What is dosage compensation? Explain lyonnhypothesis. Discuss its significance. (20) Q:-2 Discuss the sex determination process in Drosophila. How it is different from humans. (15) Q:-3 Describe the molecular mechanism of sex determination in human. Comment on evolution of Y chromosome in mammals. (20) Q:-4 What are anadromous fishes? How their migration process different from catadromous fishes. Describe the significance of migration. (20) Q:-5 Discuss the process of osmoregulation in pieces. Describe their respiration in brief. (15)
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