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Biological Classification Test - 26

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Biological Classification Test - 26
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Weekly Quiz Competition
  • Question 1
    1 / -0
    In lichens, sexual reproduction belongs to
    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 A. 
  • Question 2
    1 / -0
    In majority of lichens, there is association of
    Solution
    The lichen fungi (kingdom Fungi-ascomycetes) cultivate partners that manufacture food by photosynthesis. Sometimes, the partners are algae (kingdom Protista), other times cyanobacteria (kingdom Monera), formerly called as blue-green algae.
    Thus, the correct answer is option C.
  • Question 3
    1 / -0
    There exists a close association between the algae and the fungus within a lichen. The fungus
    Solution
    The photobiont supplies the association of organic carbon from photosynthesis, and the mycobiont ensures protection, and regulates the supply of minerals and water. The nutritional exchange between partners is probably much more complex than exchange of water and minerals for organic carbon.
  • Question 4
    1 / -0
    Usnea is a
    Solution
    Usnea which is also known as 'Beard lichen', 'Woman's Long Hair', 'Tree moss', or 'Old mans beard', is a lichen and have a symbiotic relationship between algae and fungus. Usnea is a genus of fruticose lichens that grow like leafless mini-shrubs or are anchored on twigs. The genus is in the Parmeliaceae family. It grows all over the world.
    Thus, the correct answer is option C.
  • Question 5
    1 / -0
    Which of the following is not matched correctly.
    (a)
    		Anabaena
    		-
    		Cyanobacteria
    (b)
    		Amoeba
    		-
    		Protozoa
    (c)
    		Gonyaulax
    		-
    		Dinofiagellates
    (d)
    		Thermoaddophils
    		-
    		Archaebaderia
    (e)
    		Albugo
    		-
    		Chrysophytes
    Solution
    Albugo is the parasitic fungi which are found on mustard. It is the member of Phycomycetes that are found in aquatic habitats and on decaying wood in moist and damp places.
    So the incorrect matched option is E. 
  • Question 6
    1 / -0
    Helotism is a term used for the symbiosis of
    Solution
    Helotism is a term used for the symbiosis of algae and fungi i.e., lichen. Fungus sends haustoria into algal cells and induces alga to secrete organic substances and prevent alga to develop pectic covering. It means fungus is a controlled parasite over the alga. Such king and slavery relation is called as helotism.
  • Question 7
    1 / -0
    Powdery mildews of crops are caused by

    Solution
    Powdery mildew diseases are characterized by the presence of fungal mycelium, conidiophore and conidia as white powdery patches on the host. Powdery mildew is caused by fungi which belongs to ascomycetes.
  • Question 8
    1 / -0
    Lichens multiply by ____________.
    Solution
    Each soredia form a new thallus under favourable condition.
  • Question 9
    1 / -0
    A harmful lichen is

    Solution
    In hot season, Usnea get dry and become highly inflammable. It easily catches fire and causes forest fire.
  • Question 10
    1 / -0
    Ainsworth has placed Rhizopus in ____________.
    Solution

    • Ainsworth G. C. classification of fungi is based on morphology, especially of reproductive structure.
    • He placed Rhizopus in class Zygomycetes.
    • Rhizopus species mostly are saprobic (decomposers) and feed on a variety of dead organic matter, though some species are also parasitic or pathogenic.
    • The body of Rhizopus is branched and composed of three types of hyphae: stolons, rhizoids, and usually unbranching sporangiophores. 
    • Mycelium is aseptate and multinucleate (coenocytic mycelium).

    So the correct answer is option A.
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