UPSC MAINS 2018 DAF

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Anthropology test week 6

Week-6 Instructions:- There are SEVEN questions divided in Two sections. All questions are compulsory. Adhere to world limit wherever specified. The number of marks carried by a question is indicated against it.                              Paper I Q:-1 Write Notes on the following in about 150 words each: (10X5 =50) a) Biological clock b) Eugenics c) Demographic transition d) mtDNA and it's use in anthropology e) Role of hormones in Maturity Q:-2(a) What is genetic markers and why they are useful. (10) (b) Discuss how lamarck tries to put forth concept of evolution? (10) (c) What do you understand by genetic load in a population? If human growth is under genetic control, why environmental factors influencing it? (20) 3(a) Discuss the relevance of ageing and senesces? What is the molecular basis of cell death? (20) (b) Give the hormonal control of fertility in male and female. (15) (c) Compare...
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Questions for 06 August Zoology

Q:-1 Why fats are being used for snoring the energy whereas carbohydrates as energy source? (20) Q:-2 Give the structure and classification of carbohydrates. Explain their stereochemistry. (20) Q:-3 Contemporary legislations are not enough to tackle down the growing concerns and danger over biodiversity. Discuss (20) Q:-4 Outline the process of glycolysis. Describe its regulation. (15)
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Questions for 23 August Zoology

Q:-1 Describe blastogenesis. Discuss the role of morphogens to establish the body axis in Drosophila . (20) Q:-2 Compare the life cycle of Obelia and Aurelia . Describe alteration of generation in them. Q:-3 Discuss the parasitic adaptations of F.hepatica and T. Solium . (10)
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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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