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Biological Classification Test - 33

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Biological Classification Test - 33
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  • Question 1
    1 / -0
    Select the wrong statement.
    Solution
    Option B is correct, because it is not that in oomycetes, female gamete is smaller and motile, while male gamete is larger and non-motile. It is actually the opposite, i.e., in oomycetes the female gamete is larger and non motile, while the male gamete is smaller and motile.
  • Question 2
    1 / -0
    Which of the following statements is / are true about slime moulds?
    Solution
    Slime molds move, and lack chitin in their cell walls. They are now classified as belonging to the Kingdom Protista (Protoctista). Whereas, a plasmodial slime mold is enclosed within a single membrane without walls.
  • Question 3
    1 / -0
    The pathogen, Microsporum causes ringworm disease in humans and belongs to the same kingdom as which one of the following?
    Solution
    Ringworm is a fungal infection, that invades the hair and hair follicles. Most cases are caused by Microsporum canis, which is ascomycetes and belong to the kingdom Fungi. Rhizopus is a mould, belongs to Zygomycetes of kingdom Fungi.
    Thus, the correct answer is option D.
  • Question 4
    1 / -0
    'Red rot of sugarcane' and 'white rust of radish' are respectively caused by
    Solution
    Red rot of sugarcane is caused by fungus Colletotrichum falcatum an old name(new name Golmerella tucumanensis). It forms conidia. White rust of radish is caused by Albugo candida fungus and it is an oomycete. Thus, the correct answer is E.
  • Question 5
    1 / -0
    Fungi differ from algae in having:
    Solution

    Solution:

    Correct answer is option A.
    Explanation for correct option:

    • Fungi differ from algae in having a chitin wall and they lack chlorophyll. Chitinous cell wall is a feature observed in Fungi.
    • Algae have a cell wall made of glycoproteins and not chitin. Also, algae are autotrophs, while fungi are heterotrophic, saprophytic and even parasitic. 

  • Question 6
    1 / -0
    The cell wall of a fungus consists of:
    Solution
    The fungal cell wall is a complex structure composed of a complex sugar called chitin. Cellulose and hemicellulose are the components of the cell wall of plants.
    Hence, the correct option is C.
  • Question 7
    1 / -0
    Which of the following is a foliose lichen?
    Solution
    Foliose lichens are flattened and leaf-like, with distinct upper and lower surfaces. The upper surface bears the photosynthetic layer and, often, the reproductive structures. The lower surface may have rhizines or other structures that attach to the substrate. Parmelia is a genus of medium to large foliose lichens. The ends of the leaf-like lobes are often squarish-tipped.
    Thus, the correct answer is option C.
  • Question 8
    1 / -0
    Stemonites has ...........types of plasmodium.
    Solution
    • Stemonitis is a distinctive genus of slime moulds which is found throughout the world (except Antarctica). 
    • They are characterised by the tall brown sporangia supported on slender stalks, which grow in clusters on rotting wood.
    •  In stemonitis, when the network is very fine, the transparent protoplasmic filaments is not obviously differentiated into endoplasm and ectoplasm in their initial stages of Plasmodium. This condition is called Aphanoplasmodium.
    •  Hence,  Stemonites has Aphanoplasmodium types of Plasmodium.
    • So, the correct answer is 'Aphanoplasmodium'.
  • Question 9
    1 / -0
    Bacterial genome consist of 
    Solution
    The bacteria are the small prokaryotic organisms. These organisms have a circular genome which is wound to form a double-stranded structure. There are ori sites from where the genome breaks and the replication start from this site. There are other extrachromosomal DNA known as plasmids which are circular and double-stranded. 
    Thus, the correct answer is option B. 
  • Question 10
    1 / -0
    Taxonomy of fungi is based on
    Solution
    Taxonomy of Fungi is based on Reproduction, though there is no unique generally accepted system at the higher taxonomic levels and there are frequent name changes at every level, from species upwards. Efforts among researchers are now underway to establish and encourage usage of a unified and more consistent nomenclature. Fungal species can also have multiple scientific names depending on their life cycle and mode (sexual or asexual) of reproduction.
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