Questions For 6 July zoology

Instructions
· All questions are compulsory.
· Adhere to world limits wherever specified.
· Draw neat and well labelled diagrams. No beautification required.
· Don’t use colour pens only pencil colour if you are an extraordinary student.
· Try to finish all questions within 2 hours in written.
· Answers will be reviewed every day at 9 pm.

Q:-1 Discuss the characteristic features of phylum Protozoa. Classify the phylum upto subclasses.(20)
Q:-2 Discuss the locomotion in protozoans. Add note on various types of locomotive organs. (20)
Q:-3What is protein targeting? Describe the retrograde mode of transportation. (10)
Q:-4 What is the protein folding? How it is regulated? Briefly discuss its significance. (15)
Q:-5 Discuss various modes of Nutrition in protozoans. (10)
Q:-6 Comment on the reproduction in protozoa. Discuss various types of parthenogenesis. (15)
Q:-7 Compare the process of O- linked glycosylation and N linked glycosylation. Why it is important?

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CANAL SYSTEM IN Porifera

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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...
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