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Biological Classification Test - 45

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Biological Classification Test - 45
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  • Question 1
    1 / -0
    Which of the following organisms cannot synthesise food on their own?
    Solution
    Fungi are heterotrophic organisms and they are either saprophytic or parasitic. They lack chlorophyll and cannot synthesise their own food. Algae and ferns are autotrophic. Hence the correct option is B.
  • Question 2
    1 / -0
    If organisms on the earth start dying, which group of organisms will be the last to die?
    Solution
    Monerans are organisms that can survive extreme conditions like heat and salt concentrations. As a result, they can survive even in hot water springs and volcanoes. They can also reproduce within minutes. So, they can also reproduce within minutes and produce hundreds of organisms like themselves. Mycota are fungi that survive in water bodies and mostly moist and shady locations. They too can survive if they receive moist and shady locations.
    So, option B is the correct answer.
  • Question 3
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    Myxomycetes are
    Solution
    Myxomycetes are a cellular plasmodial slime molds i.e. a group of 4 fungus which reproduces through fragmentation or zoospore.
  • Question 4
    1 / -0
    Bacteria that can grow in the absence of oxygen are called as
    Solution
    The organisms which can perform respiration in the absence of oxygen are known as anaerobic organisms. The common examples of anaerobic bacteria are Escherichia, Clostridium, Staphylococcus, etc.
    Thus, the correct answer is option A. 
  • Question 5
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    Identify the organism.

  • Question 6
    1 / -0
    Which are sensitive to sulphur dioxide pollution?
    Solution
    The correct answer is 'lichens'
    lichens are the most sensitive indicators of sulphur dioxide pollution as their growth is inhibited due to its presence. Sulphur gets accumulated in them destroying chlorophyll and inhibiting photosynthesis.
  • Question 7
    1 / -0
    Structure used for locomotion in Euglena is:
    Solution
    Euglena belongs to kingdom Protista. They are the unicellular organisms. They use flagella for their locomotion. Thus the correct option is B.
  • Question 8
    1 / -0
    What are prions ?
    Solution
    Prions are infectious pathogens that do not contain nucleic acids. They are abnormally folded proteins are found in some diseases such as scrapie. Therefore, (c) is the correct answer.
  • Question 9
    1 / -0
    Who discovered virus?
    Solution
    Pasteur. D.J. Ivanowsky (1892) discovered virus. It means venom or poisonous fluid. According to his research, certain non bacterial pathogen caused the mosaic disease of tobacco, as these particles could pass through bacterial filter and were infectious even after crystallization.
    So, the correct answer is 'Ivanowski'
  • Question 10
    1 / -0
    A virus is also known as parasite because it
    Solution
    Association of organisms which benefits one of the partners at the expense of other is called as parasitism. The virus is an acellular organism that harms it host by using host's metabolic machinery for its own replication. Viruses are the obligate parasite as they can not survive outside the host cell. Lytic viruses kill their host cells but lysogenic viruses do not. Thus, the correct answer is option E.
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