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Reproduction in Organisms Test - 37

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Reproduction in Organisms Test - 37
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  • Question 1
    1 / -0
    Pollination is a characteristic of
    Solution
    Pollination is the characteristics of flowering plants i.e., angiosperms. After the pollen tube reaches the ovary, the process of double fertilization occurs in the angiosperms. One of the male gamete fuses with the egg cell (syngamy) which results in the formation of zygote. The second male gamete fuses with two polar nuclei to form a triploid, primary endosperm nucleus (PEN). This is called triple fusion. Since two fusion syngamy and triple fusion take place in an embryo sac, it is called double fertilisation. Central cell and PEN develops into the endosperm and zygote develops into the embryo.
    So, the correct answer is option A.
  • Question 2
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    The new individual grows out of the parent's body in:
    Solution
    • Hydra is an aquatic animal that reproduces both sexually and asexually.  When plenty of food is available Hydra undergoes an asexual mode of reproduction by producing a small outgrowth called 'bud' on its body. This type of asexual reproduction is called budding. The bud stays attached to the parent body and keeps growing. Once this bud matures, it breaks off from the parent body and grows individually as a new individual.
    • Amoeba and Paramecium undergo fission, where the parent cell splits into two daughter cells.
    • Plasmodium exhibits multiple fission, where many daughter cells are produced.

      • So, the correct answer is option A.

  • Question 3
    1 / -0
    Reproduction is essential for living organism in order to
  • Question 4
    1 / -0
    The fusion between the male and female gamete is called
    Solution
    Syngamy is a process in sexual reproduction that is defined as the fusion of the male gamete i.e sperm with the female gamete i.e egg resulting in the formation of a diploid zygote. Thus the correct answer is option A.
  • Question 5
    1 / -0
    Unisexual flower is 
    Solution
    Correct Option: B
    Explanation:
    • Unisexual flowers are the one in which either the stamens or the carpel are missing or non functional.
    • The flower in which both stamens and the carpel is present is called bisexual flower.
    • Petunia and Rose are bisexual flowers whereas Corn is unisexual.
    Hence, unisexual flower is corn.


  • Question 6
    1 / -0
    The life span of a dog is 
    Solution
    The life span of dog is 16 - 18 years. Life expectancy in dogs can be affected by many factors including genetic disease, diet, and exercise, similar to humans. Life expectancy usually varies within a range. For example, a Beagle (average life expectancy 13.3 years) usually lives to around 12–15 years, and a Scottish Terrier (average life expectancy 12 years) usually lives to around 10–16 years.
    So, the correct answer is '16 - 18 years'
  • Question 7
    1 / -0
    The animal that reproduces by laying eggs is:
    Solution
    Fish lay eggs instead of giving birth to little fish. As the fish grow, they hatch into fry with an attached yolk sac and which then mature into a fish. Cat, dog, and cow do not lay eggs.
    So, the correct answer is option D.
  • Question 8
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    Identify from the following, the process of asexual reproduction in Hydra.
    Solution
    Hydra, generally reproduce asexually. They do this through budding. A bud begins to form on the tubular body of an adult Hydra. The bud develops a mouth and tentacles. The bud detaches from its parent. The new Hydra is fully developed and will find its own location for attachment.
    Hence, the correct answer is option A.
  • Question 9
    1 / -0
    The small bulb-like projection coming out from the yeast cell is called -
    Solution
    • Budding is the main method of reproduction in yeast. 
    • During favourable conditions, yeast reproduces by budding in which a small bulb-like outgrowth called bud forms on the parent cell.
    • After this nucleus of the parent, the cell divides and migrates into bud. 
    • This bud increases in size and finally breaks off. 
    Thus the correct answer is option A.
  • Question 10
    1 / -0
    The common method of asexual reproduction is
    Solution
    Asexual reproduction is a type of reproduction which produces offspring which are identical to the parent cell. This mainly involves a single parent. The haploid cells of parent undergo mitotic divisions which produce an identical cell with the same number of chromosomes as that of a parent cell.
    Binary fission is a most common method of asexual reproduction which starts with the replication of genetic material which is followed by cytokinesis. A furrow is formed in the cell membrane which deepens and finally converges to separate the two daughter cell. Example- Amoeba.

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