CBSE Class 12 Biology Enhancement in Food Production (2). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.
ONE MARK QUESTION
1 List any two economically important products for humans obtained from Apis indica.
2 How are the two following varieties of sugarcane different from each other?
i) Saccharum barberi ii) Saccharum officinarum
3 Mention the strategy used to increase homozygosity in cattle for desired traits.
4 Which one of the following used in apiculture?
Hilsa, Apis indica, Sonalika
5 Which of the following is the semi-dwarf wheat that is high yielding and disease resistant? Pusa Shubra, Kalyan sona, Ratna .
6 Define plant breeding.
7 Name the scientist who developed semi-dwarf varieties of wheat in Mexico.
8 Name two semi-dwarf varieties of wheat introduced into all wheat growing places of India.
9 Where was IR-8 developed?
10 Name two better yielding semi-dwarf varieties of rice developed in India.
TWO MARK QUESTIONS
11 MOET programme has helped in increasing the herd size of the desired variety of cattle. List the steps involved in conducting the programme.
12 Define inbreeding depression. How to overcome this?
13 Why is mutation breeding necessary for breeding for disease resistance?
14 What are SCPs? What is the significance of such a protein.
15 Which part of the plant is best suited for making virus-free plants and why?
16 What is meant by germplam collection? Why is it necessary?
3 MARK QUESTIONS
17 What is meant by biofortification? Write the objectives of biofortification?
18 Define each of the following:
a) Tissue culture
19 Give one example of disease caused by each of fungi, bacteria and viruses in crop plants.
5 MARK QUESTIONS
20 What is somatic hybridization? Explain the procedure. Mention any one use of somatic hybridization.
21 Briefly describe the steps involved in plant breeding.
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