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Biological Classification Test - 34

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Biological Classification Test - 34
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  • Question 1
    1 / -0
    The prions consist mainly of:
    Solution
    The term prion refers to a pathogenic viral agent that can cause disease. The prion contains a protein molecule that can act as a pathogen. The protein molecule can fold and acquire different orientations. The disease caused by this agent is similar to the viral infection. The mad cow disease in cattle is an example of an infectious disease caused by the prion. 
    Thus, the correct answer is option A. 
  • Question 2
    1 / -0
    Coenocytic mycelium is found in
    Solution
    Coenocytic mycelium is a type of mycelium in which mycelium forms a continuous tubular growth. It is present in both Rhizopus and Mucor.
    Therefore, the correct answer is option D.
  • Question 3
    1 / -0
    Which of the following characters indicate similarity between fungi and animals?
    Solution
    • Heterotrophic nutrition is a type of nutrition obtained by digesting organic compounds. It is common to both animals and fungi. 
    • Fungus and animals are multicellular. 
    • Chitin is present in arthropods and it is also present in fungus. 
    Hence, the correct answer is option D.
  • Question 4
    1 / -0
    Which one of the following is a matching pair of certain organism(s) and the kind of association?
    Solution
    Mutualism is a type of symbiotic association between two organisms in which both are benefited. Lichen is a symbiotic association of an alga and fungus in which algal partner provides food to the fungal partner by photosynthesis and fungal partner helps in the absorption of water and minerals. Thus, the correct answer is option B.
  • Question 5
    1 / -0
    Bell - animalcule or pedicillate protozoan is 
    Solution
    • The Vorticella is a protist (protozoan) and belongs to the Phylum Ciliophora. 
    •  It is a very interesting, stalked ciliate with an inverted bell shape. 
    •  The stalk contains a contractile fibril called a myoneme. 
    •  When stimulated, it shortens, causing the stalk to coil like a spring. 
    • Hence, Bell - animalcule or pedicillate protozoan is Vorticella. 
    • So, the correct answer is 'Vorticella'.
  • Question 6
    1 / -0
    Most characteristic feature of diatoms is
    Solution
    Diatoms are floating algae. They are found is both freshwater and marine habitats. They are unicellular and the cell wall is made of silica. Hence they are said to have a silicaceous cell wall. These shells are highly resistant. When the algae are dead this silica is deposited in ocean beds leading to the formation of the diatomaceous earth. Thus the correct answer is option C.
  • Question 7
    1 / -0
    Parasexual cycle first discovered by
    Solution
    Parasexuality is a unique nature of the fungi in transferring the genetic material without the meiosis or sexual structures. This was first discovered by the Italian scientist Pontecorvo in 1956. 
    So, the correct answer is option B.
  • Question 8
    1 / -0
    The fungi are
    Solution
    Fungi are multicellular, eukaryotic, heterotrophs, that acquire their nutrients by absorption. They feed on dead or decaying organic matter or depend on host organisms.
    Therefore, the correct answer is option D.
  • Question 9
    1 / -0
    Link between prokaryotes and multicellular eukaryotes
    Solution
    Kingdom Protista is characterized by unicellular eukaryote and reproduces by the fission. The unicellular body organization, the presence of 70S bacteria, asexual reproduction by binary fission in protists suggests their origin from prokaryotic monerans and cellular structure suggested that multicellular eukaryotes have originated from protista. Thus, protists are linked between prokaryotes and multicellular eukaryotes. 
  • Question 10
    1 / -0
    Now protozoans are not included in kingdom Animalia, because these are 
    Solution
    The Protozoa are a diverse group of unicellular eukaryotic organisms. Protozoa, as traditionally defined, are mainly microscopic organisms, ranging in size from 10 to 52 micrometers. Some, however, are significantly larger. Among the largest are the deep-sea dwelling xenophyophores, single-celled foraminifera, whose shells can reach 20 cm in diameter.
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