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Reproduction in Organisms Test - 64

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Reproduction in Organisms Test - 64
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  • Question 1
    1 / -0

    The given diagram shows

    Solution
    • Binary fission is the division of bacterium cell into its daughter cell when it matures. It occurs only during favorable conditions.

    So the correct answer is " binary fission occurring during a favorable condition ".
  • Question 2
    1 / -0
    Which is the vital link that ensures continuity of species between organisms of one generation and the next ?
    Solution
    • The formation of the diploid zygote is universal in all sexually reproducing organisms. In organisms with external fertilization, the zygote is formed in the external medium (usually water), whereas, in those exhibiting internal fertilization, the zygote is formed inside the body of the organism. 
    • Further development of the zygote depends on the type of life cycle the organism has and the environment it is exposed to.
    • Zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings, begins life as a single cell–the zygote.

    So, the correct option is 'Zygote'.
  • Question 3
    1 / -0
    Type of stem modification found in Zaminkand is
    Solution
    Stem modification found in Zaminkand (Amorphophyllus) is corm. It is vertically growing underground stem. It is cylindrical in shape. it shows lower contractile roots.
    So, the correct option is 'corm'.
  • Question 4
    1 / -0
    Binary fission in Amoeba differs from buding a yeast as in the former
    Solution
    Binary fission is a type of asexual reproduction in which the fully grown parent cell splits into two halves, producing two new daughter cells. It is common among organisms such as Bacteria, Amoeba and Paramecium.  After replicating its genetic material through mitotic division, the cell divides into two equal sized daughter cells. First of all nuclear division takes place followed by cleavage of cytoplasm into equal parts. Later it corresponds to the separation of the daughter nuclei into two daughter cells. The outcome of cell reproduction is a pair of daughter cells that are genetically identical to the parent cell. 
    So the correct option is 'division of cytoplasm is equal'.

  • Question 5
    1 / -0
    Among the following which one is NOT a method of vegetative propagation.
    Solution
    The propagation of plants by growing plantlets in tissue culture and then planting them out is called micropropagation. Sowing, layering is a type of vegetative propagation. however, Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud. 

    So, the correct option is' Budding' 
  • Question 6
    1 / -0
    Organisms produced by asexual reproduction are called:
    Solution
    Since the organisms produced by asexual reproduction are completely identical to the parents due to no variation, they are called clones.
    So, the correct option is  'clones'.
  • Question 7
    1 / -0
    _______ consist of food-storing scale leaves enclosing the stem.
    Solution
    The bulb is a modification of underground stem. It consists of a reduced discoid (disc-shaped) stem and several fleshy scales. Numerous adventitious roots are produced from the base of the disc, which bears highly compressed internodes. Whereas tubers are swollen underground stem developed at the growing tip of a branch.

    So the correct option is "Bulbs". 
  • Question 8
    1 / -0
    The time for optimum chances of conception in a woman is starting from the day of menstruation.
    Solution
    This is usually about 14 days after the first day of your last period if your cycle is around 28 days long. An egg lives for about 12-24 hours after being released. For pregnancy to happen, the egg must be fertilized by sperm within this time. Sperm can live for up to 7 days inside a woman's body.

    So, the correct option is 'Option C, 14th day'.
  • Question 9
    1 / -0
    Parthogenesis is the development of an organism directly from :
  • Question 10
    1 / -0

    The correct order of binary fission in Leishmania is?

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