civils mains 2013

BOTANY (PAPER-I)
Time Allowed:Three Hours

Maximum Marks 250

QUESTION PAPER SPECIFIC INSTRUCTIONS

(Please read each of the following instructions carefully before attempting questions)
There are EIGHT questions divided in two Sections and printed both in HINDI and in ENGLISH.
Candidate has to attempt FIVE questions in all.
Question Nos. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each Section.
The number of marks carried by a question/part is indicated against it.
Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly on the cover of this Question-cum-Answer Booklet in the space provided. No marks will be given for answers written in medium other than the authorized one.
Word limit in questions, wherever specified, should be adhered to. Diagrams/figures, wherever required, shall be drawn in the space provided for answering the question itself.
Attempts of questions shall be counted in chronological order. Unless struck off, attempt of a question shall be counted even if attempted partly. Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.

section-A

Briefly describe the following in not more than 150 words each

Role of microbes in medicine industry
Vanous kinds of biofertilizers and their uses
Different types of life cycles found in algae
Types of protosteles
Lysogenic type of life cycle in viruses
10x5=50

2. With the help of suitable diagrams, describe the life cycle of a heteroecious rust. 18
Describe the various methods of genetic recombination in bacteria.18
Discuss the importance of totipotency in tissue culture.14

3. Draw well-labelled diagrams of the following:
LS of antheridiophore of Funana
18 of sporophyte of Anthoceros
Section through a sorus of fern
Female thallus with archegoniophore of Marchantia
12 1/2x4=50

4.Give the causal organism, symptoms and control measures of the following 12 1/2x4=50

(a)Wilt of Arhar
(b)Green ear disease of Bajra
Tundu disease of Wheat
Red rot of Sugarcane

SECTION-B

5.Describe the following in about 150 words each
Beta taxonomy
NPC system
Application of palynology
Distribution of cycads in India
Double fertilization
10x5=50

6.Write an account of the floral structure of each of the following families. Give the botanical names of three important plant species belonging to each of the three families and specify their uses: 17+17+16=50
Poaceae
Liliaceae
Asclepiadaceae

7.Describe the following
Types of endosperms
Types of ovules
Apomixis
17+17+16=50

8. Give the botanical names of ten important fibre-yielding plants and describe their uses. 25
Compare and contrast Bentham and Hooker's system of classification with Hutchinson's system of classification. 25