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Reproduction in Organisms Test - 54

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Reproduction in Organisms Test - 54
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are __________.
    Solution
    Amoeba and Yeast reproduce asexually. It is so because by asexual reproduction unicellular organisms can multiply very fast. These are microscopic organism. And Amoeba reproduces by fission and Yeast by budding.
    So, option A is the correct option.
  • Question 2
    1 / -0
    With reference to the 'embryonal suspensor' which one of the following statements is not correct?
  • Question 3
    1 / -0
    Which one of the following structures does a fungus produce so that it survives for a very long period?
  • Question 4
    1 / -0
    A 'clone' is defined as a collection of genetically _________________.
    Solution

     

    Organism cloning (also called reproductive cloning) refers to the procedure of creating a new multicellular organism, genetically identical to another. In essence this form of cloning is an asexual method of reproduction, where fertilization or inter-gamete contact does not take place. It is defined as the process of producing genetically identical individuals of an organism either natural or artificially. The term clone was coined by Herbert J.Webber. Clones have identical DNA.

    So,the correct option  is 'D'.

  • Question 5
    1 / -0
    Match List I with List II and select the correct answer.
    List-I(Nature of codons)List-II(Different codons)
    a. Initiation codon$$1$$. AAA
    b. Termination codon$$2$$. UUU
    c. Codon for proline$$3$$. GGG
    d. Codon for lysine$$4$$. UAA
  • Question 6
    1 / -0
    Which one of the following pairs is NOT correctly matched?
    Solution
    Correct Option: B and C
    Explanation:
    • Brown rot is a disease in potatoes that is caused by the bacterium Ralstonia solanacearum. 
    • The disease causes significant yield losses, through the rotting of tubers in affected host plants. 
    • This disease has no risk to human or animal health.
    • Brown leaf spot in potatoes is called fungus Alternaria alternata.
     It is related to the early blight of potatoes caused by Alternaria solani.

    Hence, the incorrect match is brown rot of potato- Pseudomonas solanacerarum and leaf spot of potato- Cercospora concurs.
  • Question 7
    1 / -0
    Union between a large non-motile female gamete and a small motile male gamete is called ____________.
  • Question 8
    1 / -0
    Banana propagates vegetative through _____________.
  • Question 9
    1 / -0
    Match List I with List II and select the correct answer using the codes given the lists.
    List-I(Meaning)List-II(Phenomenon)
    a. Embryos arise directly from diploid saprophytic cells(nucleus or integuments)$$1$$. Parthenogenesis
    b. An archesporium differentiates but the megaspore mother cell develops into an unreduced embryo sac$$2$$. Polyembryony
    c. Many embryos arising in one ovule$$3$$. Adventitious embryony
    d. The development of embryo from unfertilized egg$$4$$. Diplospory
    Solution
    The correct answer is B.
    In adventitious embryony, an embryo is formed directly from nucellus or integument tissue.
    In diplospory, the embryo sac is derived from the megaspore mother cell either directly by mitotic division or by interrupting meiosis. In the mitotic diplospory, the megaspore mother cell divides mitotically thrice to form 8 nuclei. The embryosac is unreduced and have same number of chromosomes and genetic material.
    Polyembryony is the phenomenon of two or more embryos developing from a single fertilized egg. Due to the embryos resulting from the same egg, the embryos are identical to one another, but are genetically diverse from the parents.
    Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm.
  • Question 10
    1 / -0
    The  stage when all the body parts can be identified is known as _____________.
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