HCS Mains Optional Paper: Botany Optional Paper 2014 frontier IAS
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Baljit Dhaka
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HCS Mains Optional Paper: Botany Optional Paper 2014 frontier IAS

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HCS Mains Optional Paper

HCS Mains Botany Optional Paper 2014

Time : 3 Hours                                                                                                                              M.M.: 150
                                
Note i) Attempt five questions. All questions carry equal marks. Questions number 1 is compulsory. Answer any two questions from Part I and two questions from Part II. The parts of the same questions must be answered together and must not be interposed between answers to the questions. 
ii) In case of any discrepancy in the English and Hindi versions. English version will be taken as final.

Q1. Write short notes on any TEN of the following:                     (10X3 = 30) 
i. Cyanophage 
ii. Sulpher shower 
iii. Ubish bodies 
iv. Leptosporangiate ferns 
v. Nepenthes khasiana 
vi. Polygenic inheritance 
vii. Clover leaf model 
viii. Biolistics 
ix. Photophosphorylation 
x. Biocoenosis 
xi. Central dogma reverse 
xii. Role of Apomixis in plant breeding 
xiii. Granite moss 
xiv. Heterosis 
xv. Mosquito fern 

                                                                  Part - I

Q2. Answer any THREE of the following:                             (3x10 = 30) 
(a) Describe a heterosporous fern studied by you. Write a note on importance of seed habit. (b) Give details of any one natural system of classification studied by you. Describe its merits and demerits. 
(c) What is secondary growth? Describe it with reference to a monocot plant. 
(d) Write an essay on economic importance of a heterotrophic plant kingdom studied by you.

Q3. Answer any THREE of the following:                                                                (3x10 = 30) 
(a) Describe the characteristic features of a family with persistent calyx. 
(b) Write a note on morphology and economic utilization of a plant which yields Morphine. (c) Describe the nitrogen fixing organ of a blue green algae with suitable diagrams. 
(d) What are the different floristic regions of India?

Q4. Answer any THREE of the following:                                                                (3x10= 30)
(a) Write a note on importance of medicinal plants. 
(b) Describe a disease which attacks the plants of family Rutaceae. 
(c) Describe the morphological features of a Liverwort studied by you. 
(d) Write a note on endangered plants of India.

                                                                           Part - II

Q5. Answer any THREE of the following:                                                                (3x10 = 30) 
(a) Describe the characteristics of prokaryotic organisms. 
(b) Write a note on a plant hormone which was discovered in Japan. 
(c) What is imbibition? Describe its importance in seed germination. 
(d) Describe energy flow with suitable diagrams.

Q6. Answer any THREE of the following:                                                                (3x10 = 30) 
(a) Differentiate between C3 and C4 cycle. 
(b) Describe standard deviation. 
(c) Write a short note on Acid Rain. 
(d) What are the main components of an ecosystem? Describe.

Q7. Answer any THREE of the following:                                                               (3x10 = 30)

(a) What is Cytoplasmic Inheritance? Give example. 
(b) Describe the phenomenon of Vernalization. 
(c) Describe a cycle present in Succulent Plants. 
(d) Differentiate between Test Cross and Back Cross.