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Biological Classification Test - 63

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Biological Classification Test - 63
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  • Question 1
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    The primitive prokaryotes responsible for the production of biogas from the drug of ruminant animals include
    Solution
    Methanogens belongs to Archaebacteria. They are primitive prokaryotes. They produce methane gas or biogas. They produce biogas or marshy gas from the drug of ruminant animals. They are found in marshy areas and digestive tract of ruminants.
    Thus, the correct answer is 'Methanogens.'
  • Question 2
    1 / -0
    Azotobacter and Beijerinckia are examples of ___________.
    Solution
    Azotobacter and Beijerinckia are examples of the symbiotic nitrogen-fixing bacteria. The main principle of the nitrogen fixation is that the molecular nitrogen in the air is converted into ammonia $$(NH_3)$$
  • Question 3
    1 / -0
    Primary producers of deep sea hydrothermal vent ecosystem are
    Solution
    Primary producers of the deep sea hydrothermal vent ecosystem are chemosynthetic bacteria. Sulfide-oxidizing bacteria are chemolithotrophic in nature. They are found in the deep sea hydrothermal vent ecosystem. They provide the primary food for the invertebrates found in the immediate vicinity of the vent ecosystem.
    Thus, the correct answer is option C.
  • Question 4
    1 / -0
    Archaebacteria common in marshes and rice fields are
    Solution
    Methanogens belongs to Archaebacteria. The other members of Archaebacteria includes halophiles and thermophiles. These are primitive prokaryotes. Methanogens produce methane gas or biogas. They produce biogas or marshy gas in marshy areas, rice fields and digestive tract of ruminants.
    Thus, the correct answer is 'Methanogens.'
  • Question 5
    1 / -0
    What is correct
    Solution
    • Protozoa are animal-like protists.
    •  These unicellular eukaryotes that lack cell walls. 
    • They are heterotrophic and feed on other microorganisms or on organic particles. Example, Amoeba, Paramoecium etc
    • So, the correct answer is "Protozoans lack cell walls'.
  • Question 6
    1 / -0
    In lichens, sexual reproduction is usually performed by
    Solution
    Lichens exhibit the symbiotic association between algae and fungi. In this plant, algae is the photosynthetic partner involved in food preparation and the fungal partner increases the surface area for the absorption of water and minerals. Also, the fungal partner is involved in sexual reproduction with the help of reproductive structures called apothecia. 
    Thus, the correct answer is option B. 
  • Question 7
    1 / -0
    Zygospore are produced in 
  • Question 8
    1 / -0
    Which is not an example of eukaryotic cells?
    Solution
    Amoeba proteus, Paramecium caudatum, Euglena viridis are unicellular eukaryotic organisms and belongs to the kingdom Protista. Escherichia coli is a prokaryotic organism and belongs to the kingdom of Monera. It does not have nucleus or other membrane-bound cell organelles like chloroplast and mitochondria. Also, ribosomes of prokaryotes like Escherichia (70S type) are different from ribosomes of eukaryotes.
    So, the correct answer is option D. 
  • Question 9
    1 / -0
    Methylobacterium causes conversion of
    Solution
    Methylobacterium is a genus of Rhizobiales. It is an aerobic, facultative methylotrophic, fastidious bacterium. It causes conversion of methanol into single cell protein. It contains quinoprotein methanol dehydrogenase (MDH) enzyme which oxidizes methanol into protein.
    Thus, the correct answer is 'Methanol into protein.'
  • Question 10
    1 / -0
    The term protista was coined by
    Solution
    Protista was first observed by John Hogg in 1860. This kingdom was known as Kingdom 'Protoctista' at that time and consist of unicellular plants and animals. In 1866 Ernst Haeckel coined the term 'Protista' for them.
    Hence the correct answer is option A. 
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