Rajasthan Board Class 12 Question Paper 2020 Agriculture Biology

 Roll No.

No. of Questions – 30
No. of Printed Pages – 7 SS-39-Agri. Bio.

   (AGRICULTURE BIOLOGY)
  , 2020
 3¼ 
 56

     

GENERAL INSTRUCTIONS TO THE EXAMINEES :

(1)    -     

Candidate must write first his / her Roll No. on the question paper compulsorily.

(2)      

All the questions are compulsory.

(3)       -    

Write the answer to each question in the given answer-book only.

SS-39-Agri.Bio. [ Turn over

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(4)      ,         
For questions having more than one part, the answers to those parts are to be written
together in continuity.

(5) -    
       //      
    
If there is any error / difference / contradiction in Hindi & English versions of the
question paper, the question of Hindi version should be treated valid.

(6)      
 1 – 13 1

 14 – 24 2

 25 – 27 3

 28 – 30 4
Section Q. Nos. Marks per question
A 1 – 13 1
B 14 – 24 2
C 25 – 27 3
D 28 – 30 4

(7)   27, 28, 29  30     
Question Nos. 27, 28, 29 and 30 have internal choices.

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 – 
SECTION – A

1.         ?
Where is Central Arid Zone Research Institute located ? 1

2.               
Write the name of Indian institute which collect and conserve germplasm. 1

3.             ?
Which hormone is used to treat diabetes ? 1

4.          ?
How many pairs of legs are present on the body of insects ? 1

5.                  
Write the name of any two predatory birds which eat insects during ploughing of field. 1

6.             ?
What is called to chlorotic plants due to lack of light ? 1

7.         ?
First time, who discovered living cell ? 1

8.                   
Write the name of a bajra disease in which honey dew like droplets are seen on earheads. 1

SS-39-Agri.Bio. [ Turn over

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9.           
Write the name of pathogen of little leaf of brinjal. 1

10.            ?
How many pairs of tentacles are present on the head of snail ? 1

11.             
Write the name of any one internal parasite which is found in human beings. 1

12.             
Write the name of any one fish that eats mosquito larvae. 1

13.     ,       
Write the name of revolution, which is related to the production of fish. 1

 - 
SECTION – B

14.         
Explain any two objectives of plant breeding. 1+1

15. ...               
Write the full form of P.C.R. Mention any two methods of gene transfer. 1+½+½=2

16.            ?   “  ”    ?
In which season, the maximum loss to the crops by red hairy caterpillar is occurred ?
Why so is it called red hairy caterpillar ? 1+1=2

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17. “ ”     

Write short note on pheromone trap. 2

18.          
Explain any two methods of insect control by mechanical methods. 1+1=2

19.             
Write the function of capsid of virus. Draw a labelled diagram of virus. ½ + 1½ = 2

20.              ...   
 
Write the name of a microbe that contains peptidoglycan and mesosome. Write the full
form of B.G.A. 2

21.              
Write the cultural management of molya disease of wheat. 1+1=2

22.       ( )
Write the importance of honeybee in agriculture. (any two points) 1+1=2

23.          ?        
What is the importance of fish in food ? Write the common name of Tor tor fish. 1½ + ½ = 2

24.         (     )
Draw a labelled diagram of external structure of grasshopper (label any four parts). 4 × ½ = 2
SS-39-Agri.Bio. [ Turn over

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 – 
SECTION – C

25. Ti    ? Ti      

What is Ti plasmid ? Draw a labelled diagram of Ti plasmid. 1+2=3

26.            
Write about the symptoms and chemical management of root knot disease of vegetables. 2+1=3

27.   “  ”    ?        

      
Why earthworm is known as farmer’s friend ? Write the name of excretory organ of
earthworm ? 2+1=3
OR
Explain the economic importance of leech. 1+1+1=3

 – 
SECTION – D
28.              

            
Write the definition and objectives of hybridization. Describe the types of hybridization.
1+1+1+1=4
OR
Define germ-plasm conservation. Describe different methods of germ-plasm
conservation. 1 + 1½ + 1½ = 4

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29.    ,       

    ,      
Write the scientific name, nature of damage and management of termite. ½ + 1 + 2½ = 4
OR
Explain in detail about scientific name, nature of damage & management of khapra
beetle. ½ + 1 + 2½ = 4

30.      ,       

     ,      
Discuss the symptoms, pathogen & management of white rust of mustard. 1½ + 1 + 1½ = 4
OR
Describe the symptoms, pathogen and management of yellow rust of wheat. 1½ + 1 + 1½ = 4
____________

SS-39-Agri.Bio. [ Turn over

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