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Strategies for Enhancement in Food Production Test - 53

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Strategies for Enhancement in Food Production Test - 53
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  • Question 1
    1 / -0
    Through which technique more female plants can be produced in Papaya ___________.
    Solution
    D. Tissue culture
    Solution : By tissue culture female plants can be produced by using female explants with the help of meristematic cells in the tissues.
    So the correct answer is " Tissue culture"
  • Question 2
    1 / -0
    What is true in case of Honey Bee?
    Solution
    In case of honey Bees, males develop from unfertilized eggs and are haploid, and females develop from fertilized eggs and are diploid (Haplodiploidy).

    So, the correct answer is 'Male haploid, female diploid'.
  • Question 3
    1 / -0
    An animal where male carries half the chromosomes present in female is?
    Solution
    Bees have a different number of chromosomes. Females, workers and queens have 32, 16 are contributed by the queen's eggs and 16 come from the drones sperm. Since drones hatch from unfertilized eggs, they only have the 16 chromosomes that were in the egg. Drones are haploid because they only have one set of chromosomes.

    So, the correct answer is 'Honey Bee'.
  • Question 4
    1 / -0
    Callus is
    Solution

    Correct Option: D

    Explanation:

    • Callus is a mass of growing, undifferentiated cells that form a plant.
    • It heels injury in phloem.

    Hence, Callus is material that heals injury in phloem, undifferentiated mass of cells and tissue developed in the region of wound.

  • Question 5
    1 / -0
    Embryoids formed in tissue culture from pollen grain are due to
    Solution
    Embryoids formed in tissue culture from pollen grain is due to cellular totipotency of the callus developed by the explant. The explant is surface sterilized and is cultured on the nutrient media which develops into a callus. Callus has totipotent cell which further forms embryoids. Embryoid is a three-dimensional structure which contains the pleuripotent cells. It has the ability to differentiate when cultured on artificial media. It is a non-zygotic embryo formed in vitro culture which when cultured on the nutrient media develops into developing embryo and it develops into a plantlet.
    So, the correct answer is option B.
  • Question 6
    1 / -0
    Explant is
    Solution

    Correct Option: A

    Explanation:

    • Any part of the plant using which the entire plant can be regenerated is known as explant.
    • This is done by growing in a test tube in sterile condition and in a special nutrient medium.

    Hence, explant is a small part of plant for tissue culture.

  • Question 7
    1 / -0
    Male produce sperms by mitosis in _______________.
    Solution
    In organisms which have haploid males (such as honeybees, Apis mellifera), there is a variation of meiosis during spermatogenesis. The meiosis-I is abortive i.e. the chromosomal events such as crossover and separation of homologous chromosomes, do not happen. However, some cytological changes do happen which is described by Sharma et al (1961) as "simulation of the normal meiosis I". This is followed by meiosis II (which is mechanistically same as mitosis). So, basically there is no halving of the number of chromosomes and the gametes are also haploid.

    So, the correct answer is 'Apis mellifera'.
  • Question 8
    1 / -0
    Arabian Race Horse has developed through 
    Solution
    The Arabian is the original race horse. When the English breeders wanted to add speed and endurance to their horses, they turned to the Arabian. The result was the Thoroughbred. But the Arabian was the source, its blood and spirit created the Sport of Kings. Hence, Arabian Race Horse has developed through human efforts.
    So, the correct answer is 'Human efforts'.
  • Question 9
    1 / -0
    Sex determination of chicken is done when they are _____________.
    Solution
    It was the first reliable method of determining the sex of chicks and hatcheries use this method even today vent sexing is a procedure of holding the one day-old chick in one hand and viewing the copulatory organs to determine
    sex based in shape.
  • Question 10
    1 / -0
    First unbeaking in chicken is done on :
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