Free Ncert Solutions for 12th Class Biology Strategies for Enhancement in Food Production / खाद्य उत्पादन में वृद्धि के लिए रणनीतियाँ - Studyadda.com

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12th Biology Strategies for Enhancement in Food Production

1)

Explain in brief the role of animal husbandry in human welfare.
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2)

If your family owned a dairy farm, what measures would you undertake to improve the quality and quantity of milk production.
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3)

What is meant by the term "breed"? What are the objectives of animal breeding?
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4)

Name the methods employed in animal breeding. According to you which one of the methods is the best? Why?
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5)

What is apiculture? How is it important in our lives?
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6)

Discuss the role of fishery in enhacement of food production.
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7)

Briefly describe various steps involved in plant breeding.
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8)

Explain what is meant by biofortification.
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9)

Which part of plant is best suited for making virus free plants and why?
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10)

What is the major advantage of producing plants by micropropagation?
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11)

What are the various components of medium used for propagation of an explant in vitro?
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12)

Name any five hybrid varieties of crop plants, which have been developed in India.
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13) The chances of contacting bird flu from a properly cooked (above 100° C)chicken and egg are (a) very high (b) high (c) moderate (d) None of these
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14) A group of animals which are related by descent and share many similarities are referred to as (a) breed (b) race (c) variety (d) species
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15) Inbreeding is carried out in animal husbandry because it (a) increases vigour (b) improves the breec; (c) increases heterozygosity (d) increases homozygosity
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16) Sonalika and KalyanSona are varieties of (a) wheat (b) rice (c) millet (d) tobacco
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17) Which one of the following is not a fungal disease? (a) Rust of wheat (b) Smut of bajra (c) Black rot ofcrucifers (d) Red rot of sugarcane
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18) In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because (a) the dividing cells are virus resistant (b) meristems have antiviral compounds (c) the cell division of meristems are faster than the rate of viral multiplication (d) viruses cannot multiply within meristem cell(s)
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19) Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of (a) shorter rice plant (b) better irrigation facilities (c) early yielding rice variety (d) disease resistant rice variety
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20) Which one of the following combination would a sugarcane farmer look forin the sugarcane crop? (a) Thick stem, long internodes, high sugar content and disease resistant (b) Thick stem, high sugar content and profuse flowering (c) Thick stem, short internodes, high sugar content, disease resistant (d) Thick stem, low sugar content and disease resistant
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21) Fungicides and antibiotics are chemicals that (a) enhance yield and disease resistance (b) kill pathogenic fungi and bacteria, respectively (c) kill all pathogenic microbes (d) kill pathogenic bacteria and fungi respectively
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22) Use of certain chemicals and radiation to change the base sequences ofgenes of crop plants is termed (a) recombinant DNA technology (b) transgenic mechanism (c) mutation breeding (d) gene therapy
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23) The scientific process by which crop plants are enriched with certain desirable nutrients is called (a) crop protection (b) breeding (c) biofortification (d) bioremediation
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24) The term 'Totipotency' refers to the capacity of a (a) cell to generate whole plant (b) bud to generate whole plant (c) seed to germinate (d) cell to enlarge in size
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25) Given below are a few statements regarding somatic hybridization. Choose the correct statements. I. Protoplasts of different cells of the same plant are fused. II. Protoplasts from cells of different species can be fused. III. Treatment of cells with cellulase and pectinase is mandatory. IV. The hybrid protoplast contains characters of only one parental protoplast. (a) I and II (b) I and II (c) I and IV (d) IV and III
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26) An explant is (a) dead plant (b) part of the plant (c) part of the plant used in tissue culture (d) part of the plant that expresses a specific gene
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27) The biggest constraint of plant breeding is (a) Availability of desirable gene in the crop and its wild relatives (b) infrastructure (c) trained manpower (d) transfer of genes from unrelated sources
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28) Lysine and tryptophan are (a) proteins (b) non-essential amino acids (c) essential amino acids (d) aromatic amino acids
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29) Micro-propagation is (a) propagation of microbes in vitro (b) propagation of plants in vitro (c) propagation of cells in vitro (d) growing plants on smaller scale
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30) Protoplast is (a) another name for protoplasm (b) an animal cell (c) a plant cell without a cell wall (d) a plant cell
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31) To isolate protoplast, one needs (a) pectinase (b) cellulase (c) both pectinase and cellulase (d) chitinase
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32) Which one of the following is a marine fish? (a) Denmark (b)India (c)China (D)India And China (b)
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33) Which one of the following products of apiculture is used in cosmetics and polishes (a) Honey (b) Oil (c) Wax (d) Royal jelly
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34) More than 70% of livestock population is in (a) Denmark (b) India (c) China (d) India and China
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35) The agriculture sector of India employs (a) 50% of the population (b) 70% of the population (c) 30% of the population (d) 60% of the population
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36) 33% of India's Gross Domestic Product comes from (a) Industry (b) Agriculture (c) Export (d) Small-scale cottage industries
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37) A collection of all the alleles of all the genes of a crop plant is called (a) germplasm collection (b) protoplasm collection (c) herbarium (d) somaclonal collection
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38) Millions of chicken were killed in West Bengal, Assom, Odisha and Maharashtra recently. What was the reason?
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39) Can gamma rays used for crop improvement programmes prove to be harmful for health ?Discuss.
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40) In animal husbandry, if two closely related animals are mated for a few generations, it results in loss of fertility and vigour. Why is this so?
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41) In the area of plant breeding, it is important not only to preserve the seeds of the variety being cultivated, but also to preserve all its wild relatives. Explain with a suitable example.
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42) Name a man-made cereal. Trace how -it was developed and where is it used?
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43) Fill in the blanks.
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44) A few statements are given below followed by a set of terms in a box. Pick the correct term and write it against the appropriate statement

(a) Mating of closely related individuals within the same breed. (b) Mating of animals of same breed but having no common ancestors either side for 4-6 generations. (c) Mating of animals of two different species. (d) Breeding of animals belonging to different breeds. (i) Crossbreeding (ii) Inter-specific hybridization (iii) out breeding (iv) out crossing (v) inbreeding

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