CBSE Class 12 Biology Enhancement in Food Production (1). 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.
ENHANCEMENT IN FOOD PRODUCTION
1 Define inbreeding depression. How the harmful effects of inbreeding depression can be overcome?
2 a) What is heterosis? b) Explain biofortification and mutation breeding methods of plant breeding to improve quality and quantity of yield.
3 a) Define totipotency. How is this ability useful to the tissue culture method?
b) What are somaclonal variations? Do they have any significance in tissue culture?
4 What is out crossing?
5 List any two economically important products for humans obtained from Apis indica.
6 How are the two following varieties of sugarcane different from each other? i) Saccharum barberi ii) Saccharum officinarum
7 Mention the strategy used to increase homozygosity in cattle for desired traits.
8 MOET program has helped in increasing the herd size of the desired variety of cattle. List the steps involved in conducting the program.
9 How are somaclones cultured from explants in in-vitro conditions? Why are somaclones so called?
10 Suggest and describe a technique through which a virus-free healthy plant can be obtained from a diseased sugarcane plant.
11 a)What is micropropagation?
b) Name the technique by which healthy plants can be recovered from the diseased plants.
12 Explain the efforts which must be put to improve health, hygiene and milk yield of cattle in a dairy farm.
13 (a) State the objective of animal breeding.
(b) List the importance and limitations of inbreeding. How can we overcome the limitations?
(c) Give an example of a new breed each of cattle and poultry.
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