Q1
long answer
50 marks
Write short notes on the following in about 150 words each :
(a) Structure of gemmules in Porifera and their importance. (10 marks)
(b) Structure and functions of parathyroid gland. (10 marks)
(c) Retrogressive metamorphosis in Herdmania. (10 marks)
(d) Locomotion in echinoderms. (10 marks)
(e) Mechanism of parental care in reptiles. (10 marks)
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Q2
long answer
50 marks
(a) Write peculiar characters of phylum Annelida. Classify this phylum into different classes and mention features of each class with examples. (20 marks)
(b) Mention the structure of respiratory organs in Lamellidens and explain the mechanism of respiration in them. (15 marks)
(c) Discuss various flight adaptations in birds. (15 marks)
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Q3
long answer
50 marks
(a) Give a comparative account of aortic arches in vertebrates. (20 marks)
(b) Explain different ways of locomotion in Protozoa citing suitable examples. (15 marks)
(c) Describe the general features and life history of Nereis. (15 marks)
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Q4
long answer
50 marks
(a) Explain types of fins in fishes and their role in locomotion. (20 marks)
(b) Describe the functions of various gonadal hormones in humans. (15 marks)
(c) Describe the general features, distribution and social organization in honey bees. (15 marks)
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Q5
long answer
50 marks
Write short notes on the following in about 150 words each :
(a) Green house effect. (10 marks)
(b) Sign stimuli in animals and their significance. (10 marks)
(c) Gene therapy and its significance. (10 marks)
(d) Null hypothesis. (10 marks)
(e) Principle and applications of gel electrophoresis. (10 marks)
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Q6
long answer
50 marks
(a) Enumerate various population characteristics. Explain the following characteristics in detail :
(i) Natality and mortality
(ii) Population dispersion (20 marks)
(b) Describe one-way and two-way F-test and its significance in biological research. (15 marks)
(c) What is sericulture ? Describe rearing of mulberry silk worm. Add a note on types of silk cultured in India. (15 marks)
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Q7
long answer
50 marks
(a) Differentiate among alpha, beta and gamma diversity. Explain various factors which threaten the biodiversity. (20 marks)
(b) Describe instinctive behaviour and learned behaviour in animals taking suitable examples. (15 marks)
(c) What are transgenic animals ? Mention their applications in applied fields. (15 marks)
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Q8
long answer
50 marks
(a) Explain the following human genetic diseases :
(i) Haemophilia
(ii) Thalassemia (20 marks)
(b) Explain various biological rhythms with the help of suitable examples. (15 marks)
(c) Write the principle, working and applications of Transmission Electron Microscope (TEM). (15 marks)
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