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Plant Kingdom Test - 49

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Plant Kingdom Test - 49
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  • Question 1
    1 / -0
    Which one has the largest gametophyte?
    Solution
    The whole moss plant is a gametophyte, naturally larger than the gametophyte of vascular plants where the plant body is sporophyte.
    So the correct option is D.
  • Question 2
    1 / -0
    Moss peristome takes part in _______.
    Solution
    The peristome is a specialized structure found in the sporangium of mosses that is responsible for spore discharge.
    Hence, the correct answer is option A, i.e., Spore dispersal.
  • Question 3
    1 / -0
    A colourless parasitic red alga is
    Solution
    Red algae are also known as rhodophytes, which is a eukaryotic alga without flagellate around 7000 living species are known till now. Red algae's are marine species. Since doesn't have flagella so motile stage is absent. It varies from unicellular to complex-multicellular algae. Most of them are autotropic except Harveyella which is a colorless parasitic red alga. Harveyella cells show secondary pit connections with other parasitic cells or host. Mostly Harveyella is parasitic over Polysiphonia. 
    So, the correct answer is option B.
  • Question 4
    1 / -0
    Agar-agar commonly used in bacterial cultures and medication is obtained from
    Solution
    Agar agar is a gelling agent with unbranched polysaccharide and is used in microbiology as solidifying agent of liquid culture mediums. It is extracted from cell wall of red algae, mostly from Gelidium sp. and Gracilaria sp.
    So the correct answer is B. 
  • Question 5
    1 / -0
    The product of conjugation in Spirogyra or fertilization of Chlamydomonas is
    Solution
    Option 'A' correct
    The product of conjugation is spisgyra or
    fertilization is chlamydomonas is zygospore. A
    diploid Eygole is The fusion product of male
    and female cell. Zygospore is a spherical structure  
    will smooth and Thick wall.

  • Question 6
    1 / -0
    A highly thickened non-motile spore is
    Solution
    Hypnospores are non-motile, thickened asexual spores in Chlamydomonas. They are the means of asexual reproduction in Chlamydomonas. The protoplasts of palmella develop a thick wall to form the hypnospores. They may develop a red-coloured pigment haematochrome in Chlamydomonas nivalis and thus causes the phenomenon of red snow. On the arrival of favorable conditions, they develop into zoospores.
    Thus, the correct answer is option D.
  • Question 7
    1 / -0
    Gametes fail to fuse in Chlamydomonas. The process is
  • Question 8
    1 / -0
    Moss protonema resembles in structure with 
  • Question 9
    1 / -0
    Juvenile state of moss is
  • Question 10
    1 / -0
    Pyrenoids are the centres for formation of
    Solution
    Pyrenoids are the subcellular micro-compartments or simply the dense bodies present inside the chloroplasts of certain algae and other plants. Pyrenoids are associated with the storage of starch as layers of starch are found to be present around them.
    They consist of a central granular core which is proteinaceous and this core is surrounded by starch plates or starch cells. Pyrenoids are also associated with the carbon concentrating mechanism.
    So, the correct answer is D.
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