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Plant Kingdom Test - 57

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Plant Kingdom Test - 57
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Macrocystis is a
    Solution
    • Macrocystis is a monospecific genus of kelp (large brown algae). 
    • This genus contains the largest of all the Phaeophyceae or brown algae.
    • Macrocystis has pneumatocysts at the base of its blades. 
    • So, the correct answer is "Brown alga'.
  • Question 2
    1 / -0
    Sphagnum is an example of
  • Question 3
    1 / -0
    Which of the following algal groups has no motile stage?
    Solution
    • Red algae (Rhodophyceae) are characterized by the absence of any motile phase. 
    • Brown algae (Pheophyceae) are characterized by the presence of motile reproductive phase with two lateral flagella. 
    • Green algae are characterized by unicellular flagellated cells or microscopic colonies of flagellated or non-flagellated cells and reproduce by zoospores. 
    • Thus, the correct answer is option A.
  • Question 4
    1 / -0
    Smooth and pegged rhizoids are present in the gametophyte of
  • Question 5
    1 / -0
    Algae have cell walls made up of
    Solution

  • Question 6
    1 / -0
    A specialised structure for asexual reproduction in liverworts is
  • Question 7
    1 / -0
    Match the lists.
          $$I$$        $$II$$
    $$(a)$$Agar agar$$1.$$Saccharomyces
    $$(b)$$Biofertilizers$$2.$$Basidiomycetes
    $$(c)$$Mushrooms$$3.$$Red algae
    $$(d)$$Vitamin $$B$$$$4.$$Blue-green algae
    $$5.$$Vibrio
    Solution
    • Agar, or agar-agar, is a jelly-like substance, obtained from red algae. Agar is a mixture of two components: the linear polysaccharide agarose, and a heterogeneous mixture of smaller molecules called agaropectin.
    • Blue-green algae can be helpful in agriculture as they have the capability to fix atmospheric nitrogen to the soil. This nitrogen is helpful to the crops. Blue-green algae are used as a biofertilizer.
    • A mushroom or toadstool is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground, on soil, or on its food source. This fruiting body is produced by Fungi belonging to Basidiomycetes, and is called the basidiocarp.
    • Yeast or Saccharomyces sps are used in the production of different vitamins from the B complex group like - B1, B2, B3, B5,B6 etc 
    • So, the correct answer is "a−3,b−4,c−2,d−1'.
  • Question 8
    1 / -0
    Major pigments of rhodophyceae are
    Solution
    • Chlorophyll a and b are found in members of Chlorophyceae.
    • Chlorophyll a,c and fucoxanthin are principal pigments found in Phaeophyceae.
    • The members of Rhodophyceae are commonly called red algae because of the predominance of the red pigment r-phycoerythrin in their bodies. 
    • Apart from this, other major pigments found in them are chlorophyll a and chlorophyll d.

    So, option C is correct. 
  • Question 9
    1 / -0
    Which is not characteristic of Bryophytes?
    Solution
    • The main body of the bryophytes is more thallus like and haploid.
    • Bryophytes are spore-producing plants that do not have vascular tissue.
    • The sex organs of bryophytes are multicellular. Antheridium is the male sex organ while the female sex organ is called archegonium. 
    • The archegonium is a flask-shaped organ and produces a single egg. The antheridium produces antherozoids, which have two flagella.
    • When the antherozoids are released into the water and when they come in contact with the archegonium, a fusion of the gametes occurs and a zygote is produced. 
    • As bryophytes can survive on bare rock, they can initiate soil formation in any barren terrain of the land. That is why bryophytes are of great ecological significance.

    So, the correct answer is option C.
  • Question 10
    1 / -0
    Which one is not a pteridophyte?
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