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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Invertebrate Zoology By Brusca and Brusca

"Invertebrates" 2nd edition presents a modern survey of the 34 animal phyla (plus the Protista) and serves as both a college course text and a reference on invertebrate biology. It is organized around the themes of bauplans (body plans) and evolution (phylogenetics). Detailed classifications, phylogenetic trees, and references for all phyla are provided. The text is accompanied by detailed line drawings and - new to this edition - four-colour photographs. Other key changes from the 1st edition (1990) include: the incorporation of all the new developments in phylogenetics, developmental biology and molecular genetics; major changes at the highest levels among the invertebrates; three phyla that appeared in the original book Pentastomida, Pogonophora and Vestimentifera no longer exist, and an entire new phylum, Cycliophora, has been erected. Moreover, this edition discusses recent work in molecular systematics, and there is a large new section on "Kingdom Protista" (...
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Questions For 04-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. Q:- 1 What is Minor phyla? Give their significance in zoology. Briefly explain any two Minor phyla important for Human health and hygiene. (15) Q:- 2 Why there is a need of parazoa? Briefly discuss its origin. (10) Q:- 3 What is the status of Protozoa? Compare it with protophy...
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Animal physiology. Adaptation and Environment

GET Animal physiology. Adaptation and Environment Author(s): Knut Schmidt-Nielsen Description: This book is about animals and their problems. It is not only about how animals function, but about the problems of living and how animals solve them. It is also about aspects of physiology that I find particularly fascinating or interesting. The book is written for the student who wants to know what animals do and how they do it. The text deals with the familiar subjects of physiology: respiration, circulation, digestion, and soon. These subjects are treated in thirteen chapters, arranged according to major environmental features: oxygen, food and energy, temperature, and water. I consider this arrangement important, for there is no way to be a good physiologist, or a good biologist for that matter, without understanding how living organisms function in their environment. The book is elementary and the needed background is minimal. The first edition of Animal Physiology has been wi...
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