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Strategies for Enhancement in Food Production Test - 31

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Strategies for Enhancement in Food Production Test - 31
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  • Question 1
    1 / -0
    Emasculation is achieved by
    Solution
    Emasculation involves the removal of stamens from bisexual flowers of the female parents in order to avoid self-pollination in these flowers. It is done before the anthers are mature. If in a condition the female parent bears bisexual flowers, then elimination of anthers from the flower bud before the anther dehisces by means of a pair of forceps (a large instrument with broad blades) is necessary. And this step is known as emasculation. Thus, the correct answer is option A.
  • Question 2
    1 / -0
    Which of the following is a fresh water fish?
    Solution
    Labeo rohita is one of the fish of the carp family called as Cyprinidae. They are commonly found in the regions of Asia and South-east Asia. They are found in fresh waters like rivers, streams and lakes. The fish is common food in Bangladesh and the Indian states of Bihar, Orissa, West Bengal and Uttar Pradesh. The fish is cultured in fresh water aquariums because of high commercial value in the market. 
    Thus, the correct answeris option B. 
  • Question 3
    1 / -0
    If a breeder has to evolve a disease resistant strain, what step should be taken first?
    Solution
    If a breeder has to evolve a disease resistant strain, the first step will be selection of parents with that particular disease resistance. This selection methods can be various types. After selection, crossing of these parents will yields disease resistance strains. Thus, the correct answer is option B.
  • Question 4
    1 / -0
    Queen bee is adapted for ...........
    Solution
    The queen bee is the most valued bee in the whole hive. A queen bee can live for 3-5 years. The main job of queen is to lay eggs. The queen mates only once with several male (drone) bees, and will remain fertile for life. She lays up to 2000 eggs per day. Hence, option A is correct.
  • Question 5
    1 / -0
    Protoplast fusion perform
    Solution
    Somatic fusion is also called as protoplast fusion. It is a type of genetic modification in plants by which two distinct species of plants are fused together to form a new hybrid plant with the characteristics of both, a somatic hybrid. 
    Hybrids have been produced either between different varieties of the same species (e.g., between non-flowering potato plants and flowering potato plants) or between two different species (e.g., between wheat Triticum and rye Secale to produce triticale). It performs somatic hybridization and also yields useful allopolyploids, such as pomato. Thus, option D is correct. 
  • Question 6
    1 / -0
    Cryopreservation is
    Solution
    Cryopreservation is a process, where cells or any other substances susceptible to damage are preserved by cooling to sub-zero temperatures without causing additional damage caused by the formation of ice during freezing. At low temperature, all the enzymatic activities get stopped and decomposition of cells or tissues by inhibiting the growth of microbes at such temperature. Traditional cryopreservation has relied on coating the material to be frozen with a class of molecules termed cryoprotectants. Thus, the correct answer is option C.
  • Question 7
    1 / -0
    What is the reason for the formation of embryoid from pollen grain in tissue culture medium?
    Solution
    Embryoid is a mass of tissue produced during culture. Formation of embryiod from pollen in tissue culture medium is due to cellular totipotency. Cell potency is a cell's ability to differentiate into other cell types. The more cell types a cell can differentiate into, the greater its potency. Thus, the correct answer is option A.
  • Question 8
    1 / -0
    Pisciculture is rearing and production of ...............
    Solution
    The breeding, rearing, and production of fish by artificial means is called as pisciculture, in other words, fish farming. There is an increasing demand for fish and fish protein, which has resulted in widespread overfishing in wild fisheries, China holding 62 percent of the world's fish farming practice. The most important fish species used in fish farming are carp, salmon and catfish. Hence, option A is correct.
  • Question 9
    1 / -0
    Plant part used for culture is called as
    Solution
    Explant is any portion taken from a plant that will be used to initiate a culture. It can be a portion of the shoot or of the leaves or even just some cells. Thus, the correct answer is option C. 
  • Question 10
    1 / -0
    Cellular totipotency is demonstrated by
    Solution
    Totipotency is the ability of a single cell to divide and produce all of the differentiated cells in an organism. Many somatic plant cells, including some fully differentiated types (e.g., leaf mesophyll), provided they contain intact nuclear, plastid and mitochondrial genomes, have the capacity to regenerate into whole plants. This phenomenon is totipotency.
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