UPSC MAINS 2018 DAF

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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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Parasitic adaptation of Taenia

Taenia Parasitic adaptations Tapeworms live as internal parasites and they have to make several adjustments for the same. The following are few of the adaptations made by these tapeworms to make their life easy in their hosts. Presence of enzymatic resistant covering A hard covering called as tegument covers the body of these tape worms. Tegument is enzyme resistant and it protects all the internal organs from the digestive actions of the alkaline fluids of the host. On the other hand tegument is permeable to water and other nutrients. Absence of locomotory organelles This parasite lacks organs for locomotion. As there is no need for any locomotory organs both the adult and larval forms lack cilia or flagella. Osmotic pressure The osmotic pressure inside the body is higher than that of the surrounding host tissue or fluid. This helps the parasite to reside conveniently in the host body. Presence of hooks and suckers for attachment For the attachment purpose a scolex...
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Questions For 03 july-zoology

Guidelines cum Instructions for Daily Answer Writing Daily 5 to 7 questions will be posted around 11.30 pm No question on Sunday 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. Questions DAY 01- 3rd July 2018 Q:-1 Discuss The followings    250 words (10x4)  Binomial nomenclature various types of coelom  Receptor mediated Endocytosis Theories of origin of Bilatria AND Radiata ...
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Questions for 17 July zoology

Q:-1 Discuss the characteristic features of phylum Arthropoda. Classify the phylum upto sub classes. (20) Q:-2 Discuss the various larval froms in crustaceans. Explain its significance. Add short note on paracitism in crustaceans. (20) Q:-3 With labelled diagrams explain the vision in Arthropods. (20) Q:-4 Describe various significant blood groups in human. Discuss the genetic and biochemical basis of ABO system. (20) Q:-5 What is multiple allelism? Explain its evolutionary significance with suitable examples. (20)
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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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